Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab56e9f6d2487509…

MALICIOUS

PDF

50.6 KB Created: 2021-06-09 11:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f1e2253dec361f414051f141a1a6b3c SHA-1: 8680e95836141eb9e889fa1e95e5a1a816dade74 SHA-256: ab56e9f6d248750965454de39f04afac0c016e216f48e6d4e051bbcdbd5e3d98
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by an ML classifier and exhibits characteristics of a phishing lure. It contains a single image, minimal text, and numerous external links, many pointing to compromised WordPress sites. The primary attack pattern involves a screenshot lure, likely designed to trick users into clicking through to a malicious URL for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9443

Heuristics 5

  • 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 50 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://queure.ru/uplcv?utm_term=kanha+murli+ringtone
    • http://schokobrunnen.com/idata/47064195491.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160be47d9c719c---fidijomiliwobiviji.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/cdae32a4a3b56eaa62f8803eddb68328/97233986974.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/in3ojclbd5nghpn009i6dncd5j/zabuvono.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b159f961b88---wofalufimejojaruf.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/19fafad4221fa1458aa96732fd9a6382/bapibo.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/gonipimamupadakowoti.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b73c4591---vilozokadiji.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078def996f15---28351546009.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd3a7dcfd6---85506602573.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/1evj3tai798ro79nhirctqi9qo/83076721363.pdf
    • https://tedvandergulik.nl/userimages/file/78415002111.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5acc765f04---finemimi.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/9b126ae55c1921522d3c4b27a8afd560/widavodipuxezitazefi.pdf
    • http://k-yoga.org/file_upload/spaw_upload/file/20210504020556.pdf

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