Malicious PDF — malware analysis report

Static analysis result for SHA-256 f389e6e1bdd099cd…

MALICIOUS

PDF

41.5 KB Created: 2021-06-21 12:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df22e34231defed9086ee8e612c179de SHA-1: bc1fb92a9b86ddc395dab62e64fa446c154175bf SHA-256: f389e6e1bdd099cd61fb053753b758119acb6c500ea8c1964258ee23fdb3c40f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and ClamAV, indicating it's a phishing or malware delivery attempt. The heuristics suggest it's an image-based lure, typical of phishing campaigns, and contains numerous links to external sites, some hosted on compromised WordPress installations. No scripts were extracted, but the presence of external links implies a potential download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8113

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 41 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://infrive.ru/uplcv?utm_term=law+of+corresponding+states+equation
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/gb7rpovliindltmg6otu9lbl86/zizozajo.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/ae9dc0c368b85f614b04cbb6a29aa34a/xosamewomo.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/3m77061fa98r3l13r00cjke9ql/10806562975.pdf
    • http://kadh.kr/bobod/upload/file/lasipumubuvubogur.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096619d20e2e---924273372.pdf
    • https://amrapalispot.com/userfiles/file/26644035733.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/b7b5495b9414faee6f2eeb2173507d6a/pijuwoxewebenilizator.pdf
    • http://www.fonfe.com/uploads/files/12977732081.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607555bca6942---78415417173.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5dfa190ae---4465417021.pdf
    • https://namratalakhotia.com/userfiles/files/bitutomuvorunodibixubuz.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ae786445d---zuguresotafedepebemakurur.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/4um3jvg7ik1sk396t01kag5s34/8732668434.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/6p46v1j20012j9ck9c2jkmrjkp/vewumuvafimapugi.pdf
    • https://stvorki.ru/files/file/suxuvulo.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2f1aabaa0---43135190758.pdf

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