Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b5e7071533aa48…

MALICIOUS

PDF

40.1 KB Created: 2021-09-04 06:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 387bcb16f402b9549e81ba1a4c2a484f SHA-1: 38f69ecc6874d232417ec5003578f6d83a723bb9 SHA-256: d1b5e7071533aa48137346d255b8d1588e983f9965fe850cd25128c76d4eb5f3
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a phishing lure due to its small size, image-heavy content, and embedded links. The heuristics indicate it functions as a link farm, directing users to various compromised CMS upload locations. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9743

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 40 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 http://school19-zav.ru/userfiles/file/zavitofifedidofujebu.pdf In PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/43e969a1f73c411eb544e7381ee79dbe/76212743764.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d68e2f783b4---10147046576.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9ad0168cd1386d2e3480ce813a05746e/fotutig.pdfIn PDF document text
    • http://asvpp.fr/pdf/biruxuwilenazivape.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/93612846107.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/56686439780.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/98505004788.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610ff32a80a82---kixenidika.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/sezamexew.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gb9d2a6j6k0u23lqu45qovldm4/5942831602.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fdbadc43b29---ponuvoxonetisomamumamike.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/6908388230.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/xijivibowuximo.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f965d8d4ac---puwaferelim.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/buqa0sjcn04udnepllqqmt4vn3/86587455761.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/a84b4cbfd8f2ce939c5f68530bdceeb2/gafupupebivobusi.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/27163c759d660b07f26e9453d5e05074/juwonanep.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/92111239230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=delhi+metro+phase+4+map+pdfPDF link annotation

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