Malicious PDF — malware analysis report

Static analysis result for SHA-256 d863fc6abc2f070c…

MALICIOUS

PDF

54.7 KB Created: 2021-05-08 08:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a871586caa674fd35dc0b593e1df3729 SHA-1: f915563bbb917f84d79ff1ad0e3cb9d82796642d SHA-256: d863fc6abc2f070c0d13c373f787ebaf2636fdb2b92863d8b2077b7a8ae30171
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7658

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://inwebjor.ru/uplcv?utm_term=power+of+attorney+act+2016+pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/lpf24eta06llshdl778ptbf7jo/bawiwudum.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/e4ed2851911c251a22bd781af8d70992/19974107803.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/c5f5316e09b7541ddff064d6327798b0/4624556954.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/bha10ialbtsgsohjuvcrvbt26a/82523733134.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/bkkrj2so3s5u8mosv2nvv25b3j/barixak.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/ab2bd9d96e61939cd537476d898e83a5/disiguserimujim.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/6d332d8ae48453f47f25e39446fc2c46/49896244079.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57ec78552---89994353455.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/titajademexenozokifib.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/9l20i20nvne7v6ogn8j0jdqja2/nifolomemokiza.pdf
    • http://bitite.lv/media/txt/122/file/zukuz.pdf
    • http://aryajob.com/user_upload/file/63543782090.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c115a2dbf---xilanazibirogizogifiwivu.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16089935c6b709---76723031982.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/8812de583d895ef942d4478385eb42cc/51969891577.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0c5b27e1ba84e1cb18cbfc26ca556043/nuxonawumalu.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885368ba540---44313934704.pdf

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