Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea0cefff25ce339…

MALICIOUS

PDF

39.1 KB Created: 2021-09-24 23:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2999c25ef41837e697f19bce2b6c5f23 SHA-1: 8122b68fddea2b362b31a2c2dd5e67be19fee503 SHA-256: 0ea0cefff25ce339324178d8a692fd0496729bf8be02ea702df103926e91fc45
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure due to its small size and image-based content, typical of a screenshot designed to hide clickable links. The document body is heavily obfuscated, but the heuristics indicate a link farm pointing to compromised or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript further supports malicious intent, likely to execute further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8883

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aluminial.pnh.pt/js/ckfinder/userfiles/files/fakumosegobobojo.pdf
    • http://coachhouse.info/assets/file/78723701837.pdf
    • https://buyafranchise.org/files/files/zunozesezamuzaruxijezeje.pdf
    • http://ivankrivanek.com/userfiles/file/zikutojotinena.pdf
    • https://cambodiadriverservice.com/userfiles/file/maser.pdf
    • https://www.ocnistudio.cz/ckfinder/userfiles/files/5289242040.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448c59e629f---kuvema.pdf
    • http://oishisushigd.com/uploads/files/12049084251.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/3f6235ed637e42a38ac6f674820290e0/jilazasewapumawake.pdf
    • http://test-immo.com/file/33521352643.pdf
    • http://slsnn.ru/content/files/fajezuzomubag.pdf
    • https://workinhotel.com/upload/fckfile/44967781434.pdf
    • http://dailythang.com/userfiles/files/94795023715.pdf
    • http://showpalmedical.com/userfiles/95171514964.pdf
    • http://vedepcuaem.com/luutru/files/65331841517.pdf
    • https://weekendtripskolkata.com/userfiles/file/suzevegesupimugotubawano.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133114726ff1---66155576153.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=moto+z2+play+pie+update

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