Malicious PDF — malware analysis report

Static analysis result for SHA-256 beecaf05302fe20a…

MALICIOUS

PDF

78.9 KB Created: 2021-06-12 15:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ce8729bf36e853c11c92266e4edf882 SHA-1: a8314f2086267a3ba3feed4abb2bd6f4eb3f6eb4 SHA-256: beecaf05302fe20aae25b348c79e9d162997a725a96a365e10362bfd6bebd017
164 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body's garbled content suggests it is not meant for direct user consumption but rather to host the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://wastran.ru/uplcv?utm_term=kaatru+veliyidai+starmusiq
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9bq2904d4je9v30ifvdsqoff83/78446509452.pdf
    • https://eminencesolutions.in/resources/userfiles/file/63443484542.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/9upv86vrjbf8tvs1gk5ktlpjm5/natoxebus.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811b1dae612---sujowi.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/hhnc9rsk9roj0c4mi9lc08cci0/75266401034.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66b13dfed0---62176797216.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e718af9be---30061776358.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/1ca1a8e8e03e371402ad7ef7920b47a0/51843200431.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/79d75a9c0bd9c3382d2388a4efe85d8f/75793902503.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c5b47152---98185757282.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5cee5acfb---pexudukasirefogesuxuxu.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfff4c715a---jomepajidelimatowi.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f67981ea2---tibixo.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/nf40so8vpu2qv2iee0krj45h32/puzepefemufi.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f019f1a0ef---xewalenamunew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d3.bin
ae9962db874fade00146cc9a5b7aedad1f2c54f86a7a28d7569c545d79ee7b79
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 5228 bytes
font_01_sfnt_off00010995.bin
7a36825c530cae9af87ac8bdd8680a56532572df184b0ea7b0ac17a05f355735
pdf-font-stream PDF embedded font (sfnt) at offset 0x10995 11196 bytes