Malicious PDF — malware analysis report

Static analysis result for SHA-256 78adccba3dd933ce…

MALICIOUS

PDF

39.3 KB Created: 2021-06-10 20:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: abd6eed7299dd41375811ff1c0c83692 SHA-1: 1107bd322c2708362d6bc4fe5b39fc2a1a1f2a32 SHA-256: 78adccba3dd933cea43885618157acd692e2513d1e66cb8802b83717496e6040
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, directing users to various compromised WordPress upload sites and other domains, likely for phishing or malware distribution. The document's structure, containing minimal text and a single image, strongly suggests it's a screenshot lure designed to trick users into clicking embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8352

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 https://crysiq.ru/uplcv?utm_term=bloons+monkey+city+hacked PDF link annotation
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160762974baf5b---vidatugimurinonunixixitob.pdfIn PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/tabodorejuzemajaf.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b58526969---widamegukujod.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/177bc9c0cad6134b53fd9dd6363aaef8/sudixegomaku.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083732db9a0f---21336456056.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/31869862170.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608626d62e128---sopuxo.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/gpveg21anl62p3fisiq0i182qq/wofegakegatal.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/d302e5eef47655c5255c44d87d58ba3d/88470368672.pdfIn PDF document text
    • https://t2sc.me/userfiles/xokajagipaminujisaluwif.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/v9lrrk7cvnhvq7f9ceh73h6or2/bosebewimizufemorozen.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/0545e6ce295daa08c9da5d6dde607417/95476135490.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/rixukatezujig.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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