Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b05afc04713418f…

MALICIOUS

PDF

109.8 KB Created: 2021-07-01 21:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 74b6f93421bdcf553b0fa5099d8fd972 SHA-1: 2499f000579edc814e71b9c0b3b69e6822d5e0f6 SHA-256: 7b05afc04713418f85ea0401ca191cf8bdf36b5b9a744f23c486d16ee2bf3377
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, specifically a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and other domains. The presence of external URI heuristics and the PDF_SEO_DISPOSABLE_LINK_FARM rule indicate a deliberate attempt to redirect users to external content, likely for malicious purposes such as phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3958

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://laborke.ru/uplcv?utm_term=aspect+of+the+beast+pathfinder PDF link annotation
    • http://asbufestival.com/uploads/FCK_files/file/17441432658.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/pamosiderojisubam.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cb0668784---71121880360.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/mibakovanitorotojug.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/15187551326.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/zadojif.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/40133237528.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091200c9bb3c---51630247433.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2dff0b22d16a661d33ab01013e09b65c/kibaxigilekapowujoju.pdfIn PDF document text
    • http://rld-carbon.ru/file/36833428286.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/nekazonejujidujekemered.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/gojk9h5appquiel7e0qbb0l56i/30921781946.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbb650b321---gikefawixudakadin.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a2abf5079db---48388016270.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/nuferoluxa.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b82e4a22386---49094478377.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a02061f13---budegoxitufedunituxi.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/52528259075.pdfIn PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/41526846978.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607209c5f3efc---43208670407.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/wodudonedojamejikoniki.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872249ca1bf---jogopiluxugopanos.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/30fbbd9a6ccaff1166a875212b67eeb7/biditabab.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fd5e1e47e---81452675181.pdfIn PDF document text

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