Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d9153671e568bc…

MALICIOUS

PDF

38.0 KB Created: 2021-03-17 05:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c28c272033c817e06c40712397eb1be1 SHA-1: 9b7f01e3969caef8e4c83028ce41b6358cec097d SHA-256: b7d9153671e568bccf0a3b02ceaa2a23c3a721224ba130b1d5cf1dd35e96935b
114 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and a machine learning classifier. It employs an image-only lure, a common tactic for phishing, which likely contains a clickable element leading to the external URL. The document body, though heavily obfuscated, suggests a lure related to IELTS writing samples, which is a common pretext for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6972

Heuristics 4

  • 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://xajibur.ru/award?keyword=ielts+writing+task+1+sample+essays+band+7+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497368/normal_600cc7d763b92.pdfIn PDF document text
    • http://lolafoduluj.22web.org/godogulodozakubuz.pdfIn PDF document text
    • http://jokebixa.22web.org/eaton_endurant_transmission_service_manual.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_76c7ef4fe72a4a249274536779680576.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d16325-2a62-4746-905a-e96ef3cb6cea/kazalimofikekisa.pdfIn PDF document text
    • http://xukobogovug.rf.gd/gizukigewumofo.pdfIn PDF document text
    • http://kuwademepekipil.epizy.com/17033396017.pdfIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_a160993bae3040408bf0d74b3d479a68.pdf?index=trueIn PDF document text
    • http://nunidekizezovaf.rf.gd/who_sells_american_journey_dog_food_near_me.pdfIn PDF document text

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