Malicious PDF — malware analysis report

Static analysis result for SHA-256 9204afeaf24ad5b2…

MALICIOUS

PDF

48.0 KB Created: 2021-03-20 22:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12440877cf71417aaa66e68532012b74 SHA-1: 9b7e4c0c506e1269e835d03f0936a8f4fc65f3af SHA-256: 9204afeaf24ad5b2ea3ec302e3bb50001319fe02db48f4919e1d56b99dfa0909
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document designed to trick users into clicking an action trigger, likely leading to the URL https://kuzutuzo.ru/123?utm_term=daily+lesson+plan+template+doc+deped. The presence of numerous external PDF links, including one to striking.ly, suggests a link farm intended to distribute further malicious content or engage in SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7861

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 48 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://kuzutuzo.ru/123?utm_term=daily+lesson+plan+template+doc+deped
    • https://wewuketis.weebly.com/uploads/1/3/5/3/135327502/jujedib_gulasifewekow.pdf
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/basunoxi-bexabitakupajuk-betuf.pdf
    • https://seligelota.weebly.com/uploads/1/3/1/4/131453084/17da13e8572aecd.pdf
    • https://uploads.strikinglycdn.com/files/ff00dd5f-15ac-4444-bd1a-08bc1c02564f/chemistry_in_the_community_6th_edition_unit_1.pdf
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    • https://s3.amazonaws.com/tugabijenovili/acing_business_associations.pdf
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    • https://uploads.strikinglycdn.com/files/a21bcbc9-a8a8-43c2-b793-8010f14586c7/caballo_de_troya_saga_completa_gratis.pdf
    • https://s3.amazonaws.com/fokapikow/adobe_reader_plugin_chrome.pdf
    • https://uploads.strikinglycdn.com/files/29a7e59b-0081-44fc-839a-bec0e4aebaaa/boss_dr_880_bedienungsanleitung_deutsch.pdf
    • https://uploads.strikinglycdn.com/files/ab9af170-e906-497c-a1d5-c11f9fbf8ddd/46577427097.pdf
    • https://uploads.strikinglycdn.com/files/a2e5a03c-6129-42e4-88d9-e883373d98e9/what_causes_itchy_irritated_scalp.pdf
    • https://s3.amazonaws.com/guvovigo/sazupudikabalabixotowedup.pdf
    • https://uploads.strikinglycdn.com/files/b4ad5670-a729-4e13-b12e-307e9d21caca/muzivu.pdf
    • https://uploads.strikinglycdn.com/files/e26f6543-b614-4b32-8d24-af4627bf9904/9707427248.pdf
    • https://uploads.strikinglycdn.com/files/93611c57-2571-471d-851c-fefebda67d27/46151980273.pdf
    • https://uploads.strikinglycdn.com/files/8b9bce27-0c62-48c9-814e-0633bbf6b29e/lowisujiz.pdf