Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee84df07d7c3b137…

MALICIOUS

PDF

38.6 KB Created: 2021-10-02 18:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e0bd61fa321cf703c35338eca9b1af3c SHA-1: 65500b6392fc9ceac2e8a0b1901ad81fb19f6c18 SHA-256: ee84df07d7c3b137a9976aeb29a0ccd4ec5e92acb69aa447c6eaab3fbf2c9361
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing or malware distribution. It contains multiple links, several of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8501

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 38 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://tbsva.org/Upload/files/20210928215414.pdf In PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/rurajemalonub.pdfIn PDF document text
    • https://norservis.com/files/files/mamebu.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139efdf0c621---malesiboxavo.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/bajotopagubupewobumixu.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/20211011348347060.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/kolalefe.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/47509504582.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614229fd914b1---vevel.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/vavewewupi.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/35911224983.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/rutupu.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b38104f63---modobifevaripoduviko.pdfIn PDF document text
    • http://7166867.ru/ckfinderIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=noam+chomsky+manufacturing+consent+documentaryPDF link annotation

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