Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76905fadd086516…

MALICIOUS

PDF

39.6 KB Created: 2021-05-28 10:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 607deec04910c0829707d15a548c79d2 SHA-1: d21c4495313ba2ff0fba112dd5eb0c14698dc5e2 SHA-256: c76905fadd086516fb2a190f7729600de28a8e91aea4b5db785eddc31ad213fc
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be a screenshot, further supporting the lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8878

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160813360f3394---jekimofifililaxosoj.pdf In PDF document text
    • https://foundryindia.org/userfiles/file/vajex.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9869a702fc---45113792795.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073353d018e1---senuxufuditoduj.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/xeraduga.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076d5c6593ef---50524796447.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5c1e411455089c557ef273bbf2b3f436/xopuverufebu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d65a3b7f459bdd4ce999342a4801a02e/1292061563.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/941d426e03891e0922d0ba89bc7148c2/wuluxed.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/perogule.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0925421da6---digugusiwelesez.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/tijudotimazub.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vaduwelufixalabizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=metabolic+approach+to+cancer+treatmentPDF link annotation

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