Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ab302ce079f237…

MALICIOUS

PDF

37.7 KB Created: 2021-06-07 05:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 96d3cfc45c32a85670d5cd41a7c5bcd9 SHA-1: e588731936ecbd08ed60358f15413ae6c0b151c4 SHA-256: 22ab302ce079f237b44e5fd8af5bc3239f130c400160014c5198d57cc2eb3cbb
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a full-page image designed to obscure clickable links, a common tactic to deceive users into visiting malicious websites. The document body is heavily obfuscated and truncated, but the presence of numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, strongly suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9263

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 37 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://crewmak.ru/uplcv?utm_term=chandni+chowk+restaurant+bronx+ny PDF link annotation
    • http://mobilesamara.com/img/files/file/risonedirojezifi.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/5k51dr5fur6p9j2g0t4t2f852t/87720368765.pdfIn PDF document text
    • http://alkanboya.com/files/file/%5C/46235093363.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affb5da37bc---mekonafegegidafomejifap.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e00dedd8f---kixalosazexutopaxabanu.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073d958a5794---6188061081.pdfIn PDF document text
    • https://vestol.bg/files/file/givipoveka.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16226259271146149608.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7cb178a8f---pemupoxotojerulapabofug.pdfIn PDF document text

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