Malicious PDF — malware analysis report

Static analysis result for SHA-256 930e751763faabef…

MALICIOUS

PDF

91.8 KB Created: 2021-08-01 06:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 86b2142c35fd3b518e810375c60f8ff3 SHA-1: 2744459c8b03c010b796376a15d6cb1c186776f0 SHA-256: 930e751763faabef209fb6fc8124547a13ceb378eafea994a2f58535d96ae8b2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external sites, many of which point to compromised WordPress uploads or disposable hosting, suggesting an attempt to distribute malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://wastran.ru/uplcv?utm_term=batman+dark+knight+rises+apk+data+highly+compressed PDF link annotation
    • https://altbuket.ru/files/77932298729.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f550d8893f---85141965816.pdfIn PDF document text
    • http://cjatkinson.com/userimages/vobebujaxo.pdfIn PDF document text
    • http://sciattella.net/images/file/jumiraloxasowoweferogetaw.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/a59c93a84b305f09296ae35f841251b0/ragenutaginetek.pdfIn PDF document text
    • http://janatalnajaf.com/basefile/janatalnajafcom/files/bulatajariwumakiz.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a03e8ace6d1---59150405240.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/36b006529520555be79d5f10f88fccb4/5823892192.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160816afdb095c---kaxubovidikokeko.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///daxajiduzixitemixaz.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0204fce7ce---sigozadudu.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/877847624.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/vowalovifewuxorotekag.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ea699fa35---39273155264.pdfIn PDF document text
    • https://filetorme.com/upload/files/farijuwozugupijev.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/11d8702c9c33efe2158253a807565345/44626220832.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/kofara.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/93620977659.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/tuvapedekotoled.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/16801365345.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/0dfc787677ebdb77d8cf977dd39008d3/lafosozotikowatumuvim.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a745a244e7b---11034812195.pdfIn PDF document text
    • http://skikk.nl/app/webroot/files/userfiles/files/24187808068.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607603b64eec7---78728300383.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/xukejutolulukalepe.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0419cc4953---99042555657.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083b06d796ee---88803270090.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/tonowenepeduno.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000febe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBE 17860 bytes
SHA-256: b143b08166a0500f73ea0c0809f7845f8f6a44662857d3e7a185a811e6294f05
font_01_sfnt_off00012dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145DC 11220 bytes
SHA-256: e25fadac6b8b43bd38cec8f4f1bd374e00071af6d719ea03c6075ba0d1672346

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