Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc5f2512c39cbef…

MALICIOUS

PDF

38.0 KB Created: 2021-03-24 23:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96bb1844e68a5d7b4ab6b6e98be9afde SHA-1: cb01639c6d3139c5ac575543b9a448b6d9a7f3a8 SHA-256: 4fc5f2512c39cbef0cc58a8e499b2475ab9cbb889cd0d9a5a44ad4a5c4d8ee69
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and ML classifiers, and exhibits characteristics of a phishing lure. It contains numerous external links, including a link farm, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and appears to be an image-based lure, typical of phishing campaigns designed to trick users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6767

Heuristics 5

  • 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 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.
  • 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://gimoguvi.ru/award?keyword=criticism+of+structural+functionalism+pdf
    • https://namerodedisa.weebly.com/uploads/1/3/4/7/134771167/4336209.pdf
    • https://senoxifogixuj.weebly.com/uploads/1/3/4/7/134769413/16753.pdf
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fce015c23d6b.pdf
    • https://wanevowak.weebly.com/uploads/1/3/4/4/134465130/dijowegixuju_zodulowaz.pdf
    • https://bejobofilu.weebly.com/uploads/1/3/0/8/130814531/435dbec.pdf
    • https://cdn-cms.f-static.net/uploads/4411273/normal_60533dda0e258.pdf
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/suxuwoxefaponixi.pdf
    • https://cdn-cms.f-static.net/uploads/4419451/normal_604d33cb79874.pdf
    • https://gitapelo.weebly.com/uploads/1/3/2/6/132682700/9dee9691051.pdf
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/2458562.pdf
    • http://sofibimibojas.myartsonline.com/xitapusipimimavaxoj.pdf

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