Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0d3d38f45c7068…

MALICIOUS

PDF

79.9 KB Created: 2021-09-21 00:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1941bec01628088b8341c2eb2490fb2e SHA-1: b4282f10b9f13f2acb78829be1b1e4b4f5ab9e78 SHA-256: 9d0d3d38f45c70684c0e9107e475e9efbf5160743d3a10bac01ef2044fad16c0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and malware distribution lure. It contains numerous links to external sites, many of which are hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content or downloads. The presence of a callback phishing lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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) 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://smidgel.ru/uplcv?utm_term=photodirector+full+version+free+download+android PDF link annotation
    • https://safewatersolutions.in/ckfinder/userfiles/files/25624934901.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/xuromomemif.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/kolodugojinegunivam.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/pasap.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/4906564898.pdfIn PDF document text
    • http://na-bytecek.cz/UserFiles/File/87022358813.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/64084435761.pdfIn PDF document text
    • http://fruitvita.com/files/files/judizafironawod.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/nogesiwilesej.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090720454428.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/nelajeliru.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021091212382884.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613382dc0dc1d---7458032045.pdfIn PDF document text
    • http://opersan.com/file/fibadajexiwezidejod.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/makij.pdfIn PDF document text
    • http://uteambio.com/upload/files/94326946311.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ce93bbed824b29b5b045eb1cc9fba4ad/vomakowifumosufi.pdfIn PDF document text
    • http://hoigolfbinhthuan.com/users/files/58887001802.pdfIn PDF document text
    • https://rubfila.in/files/file/21301734615.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/89830998794.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417527348f9---paxisenamumokezeposeb.pdfIn PDF document text
    • http://land89.com/ckupload/files/63814058855.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/20357790526.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/xovamadisuzatanolabu.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_off0000d1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 17884 bytes
SHA-256: 158b92cf17a8fc2ba3a56a4e4b275cc45234c0238ba0ea87e448c6aedeef1bdf
font_02_sfnt_off000118d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D0 10824 bytes
SHA-256: 7c842ecaa81ab17887b2cd1f558ebf872db60d8797bf078b22e5ff0cf8c113fc

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