Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3da89fda3b3ef3…

MALICIOUS

PDF

39.1 KB Created: 2021-05-13 17:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 558cf6e4d11009157e38afc285f63db7 SHA-1: b2426fbb8a01f262406b0e7f85e7a41877deaf33 SHA-256: 7f3da89fda3b3ef3724b5ef24de6e9f8a730c2de3443254763e1bfff67a52e58
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-based interface with a clickable link directing to external URLs, likely intended to lead the user to a malicious site or download further payloads. The presence of multiple links on compromised WordPress sites suggests a coordinated distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7322

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 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.
  • 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://philabc.ru/uplcv?utm_term=destiny+2+free++ps4 PDF link annotation
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160984bfad3c30---19516420053.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/mem84u1uk4h9v7o5o4kfksnff0/vusuw.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9cce44527f52070824e1359519536b12/51629508224.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a29dc81400---jedasuna.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2fa3294c739b37c8b2515ba0ca03a1c8/80841806415.pdfIn PDF document text
    • http://yuha.be/_files/file/13047513058.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d89c1dd3a7---virigizonev.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/83044d25dbbcdfff51c3b1049893ea05/vepesokafagudevi.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/15f3efb457489a16a5047b2e3b33fb35/11805193535.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/b416bc29fba8e488e67e6dca52264e5c/zowutinekalogudakupa.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075df2cb5306---xatedujumoguraxedi.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2dlt37ebaht7fjf4i4sbkdfr32/nedadinituginadudaniwim.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f7bc9982e1a4be02a2a7c57eba487a21/zivovavajukowedetupu.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/zabave.pdfIn PDF document text

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