Malicious PDF — malware analysis report

Static analysis result for SHA-256 569e58c025331e85…

MALICIOUS

PDF

101.0 KB Created: 2021-06-29 00:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 332e3416fb00ac628e1492b0b9a9e7d0 SHA-1: 7b26e2571b2f528e39d6fdeb80ed3aff7426f343 SHA-256: 569e58c025331e85236703ef5558f88e66ad5c70307cda247178845952a4788e
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view its content, which is a common tactic for credential theft or malware installation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of the user's browser or system. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it acts as a dropper or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/7183cc92d2b152c1a78427c7a48169b7/gaxeraxi.pdf In PDF document text
    • http://hopkins1983.com/clients/861771/File/21258137414.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbfc46df43---54986716359.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/cacb26873b5b01963fd66cbd7d1ba83a/1235883519.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760be699546---44780555108.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/cb44a5f352e81d1f6485170af089cfb0/xaximod.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/90a8a9f7aaeee4ca38aa22ce6781c259/ruzuzezovedin.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/5smqrtbg05ql3d9pmup6iclhfe/30061738055.pdfIn PDF document text
    • https://arerp.kr/data/file///20244735434.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d86c6177b---raxan.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160812dd69bb0c---masuzomame.pdfIn PDF document text
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/xamugedobegep.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/0081puu76h3smed5n81gu59cp5/dezitubuzefijizebijiponew.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adaa93610c1---61414123789.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/2621hsrojb392bbki3j0u6j1l7/24653227625.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/majexav.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160bd09b177c7c---zuxekalibiwekutomux.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/surowuwunexolaf.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/sedoma.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/81590571670.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/39849089113.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085db0e05c8e---57041079655.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/317ed1b04a15350b3656eede48fdb3ed/kejusemut.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f84a3be5---zegidovanibuwele.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aceecdf1305---77150325609.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5fd3ba1eb---19920439759.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=experienced+software+tester+resumePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12454 16952 bytes
SHA-256: 13e01f85d07505a62bc9d1e722c663f1847fc863cc6e7df89c01bac911560f42
font_02_sfnt_off00013c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4D 18344 bytes
SHA-256: bca8bb7600fb4a8f0e1aecbd43dd11607ba637da56fbc571544539ec6bec0252
font_03_sfnt_off00016c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C07 11004 bytes
SHA-256: 8a35e000ac2eb913fc8a80130383292e6dfac206714b1a0c0766320045c606ba

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