Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab302323c4e529e…

MALICIOUS

PDF

135.8 KB Created: 2021-06-27 02:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 233ee15d7ae0b7c4416e64156d78560e SHA-1: af6c1b2c1cf3594a65cef7994dc5de24d4d516a6 SHA-256: 7ab302323c4e529ea3fdf1204c50b969c3fa170cbb77fead1d00151ee44b3ad5
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing attempt. It impersonates Microsoft and directs users to a URL that does not match the impersonated brand, likely to harvest credentials. The document contains a link farm pointing to compromised WordPress sites, suggesting a tactic to distribute malicious content or obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://crewmak.ru/uplcv?utm_term=chess+3d+for+pc.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=chess+3d+for+pc PDF link annotation
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d68a4b03c---fuxumav.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a39145edf60---64063765302.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/4s2u7kkgk4307t631dhk2rvgb7/82398238694.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/fiborozuzegekadosa.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a793ea475---zofizibeluzup.pdfIn PDF document text
    • https://sambelteri.com/contents//files/46097383430.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a1470a065e70db323a60b052bfc76cf4/tojikupekewukimogatajan.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/vivuwasorurune.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/rikugiwarapamevo.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/82268517228.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/87955f9198e385e440f192115ea716c7/84762944119.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/78760970748.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/5a4b4df6fe50f1568483a7f608a1959c/lorofi.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/6bfe8a51073ce359a254265899c6ff5e/63416023352.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/93097657372.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed2707fac4---zowerotuzumigebi.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607343a30af04---86238248480.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e27b9e7d5f---83265946704.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607f86d39ba2e---76218106010.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/74532900630.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b924f4d4511087fa6364e013450ebe80/54657090100.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/k0a42apioeqsnnvh81irbag6k0/53133949081.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/kanolixasiv.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_off0001b2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2CA 10416 bytes
SHA-256: cee9374189bf07c268fd9620493de0594b43a0d3acec9a86a86ed432cd981011
font_01_sfnt_off0001ca8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2A1 18032 bytes
SHA-256: 4c84a174156cd465f84525842039390fbf1bee9369d342a585113c648a08fec2

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