Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8e9edbcf1da039…

MALICIOUS

PDF

40.6 KB Created: 2020-12-25 06:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca92c0bfd5a1a7da90cf415ca32a6efb SHA-1: 3ed64343bcff377f252893c81d4f000681551f8e SHA-256: be8e9edbcf1da039172beb07d42b9f10f5e35582859d7f8127c97063d467b3dd
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It functions as a screenshot lure, typical of phishing campaigns, directing users to external URLs. The presence of numerous external links, including a link farm on disposable hosting, suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9257

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://trafffi.ru/strik?utm_term=spelling+games+for+5th+grade
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/472601169d5778.pdf
    • https://xejibojap.weebly.com/uploads/1/3/4/3/134310503/wipatos.pdf
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5fb9b5b4d2f30.pdf
    • https://static.s123-cdn-static.com/uploads/4412415/normal_5fe24d10772a2.pdf
    • https://wusiparopebabo.weebly.com/uploads/1/3/4/5/134505529/gewefofod.pdf
    • https://xiwitewikilimav.weebly.com/uploads/1/3/4/3/134371529/nabukajukoli-xovikurajuseb-befevome.pdf
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5fc30685b5114.pdf
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5fc1e57a534e8.pdf
    • https://dagagiketilijo.weebly.com/uploads/1/3/4/3/134312633/ad0e7.pdf
    • https://nudametuwino.weebly.com/uploads/1/3/3/9/133997501/jifejopin-xemafizukev-kipunegupobita.pdf
    • https://s3.amazonaws.com/vunizi/22508390044.pdf
    • https://s3.amazonaws.com/mudurixo/zexaxekozuw.pdf
    • https://s3.amazonaws.com/dozore/making_inference_and_drawing_conclusions_worksheets.pdf

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