Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5804b06a8e839dd…

MALICIOUS

PDF

42.9 KB Created: 2021-03-05 06:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cf5ca08bb79e98396d543fae1ede9420 SHA-1: 569c72eb05c772ca2b341a6a0536fe2bc6b6d851 SHA-256: b5804b06a8e839ddb9b32a0e7e1556c240f3752b2cc299843f2f7799d3dd0d5a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns, and contains numerous external links, suggesting it's part of a link farm designed to distribute malware or redirect users to malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8150

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 42 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/award?keyword=figure+drawing+book+pdf PDF link annotation
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    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/kotakatawimi-zomitanevon-vibavu.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/dish_network_bill_number.pdfIn PDF document text
    • https://pojuzalik.weebly.com/uploads/1/3/4/2/134235388/e4010a4d245deb4.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/roxewamujoreje.pdfIn PDF document text
    • http://novutizaxerujik.epizy.com/19822554205.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/wetuwoseson.pdfIn PDF document text
    • http://panadokopejed.epizy.com/jntuk_r13_percentage_calculator.pdfIn PDF document text
    • http://pavipalu.epizy.com/69785868957.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/nice_guidelines_pancreatic_cancer_diagnosis.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/childs_motorcycle_helmet_size_guide.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_9cade1f53b1b4ac496bbc92e118f4661.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_b087298706a94ef484dacc98db1ab764.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/ropitidanasamabelenepu.pdfIn PDF document text
    • http://xanunomoz.rf.gd/bubble_answer_sheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/bajixowup.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_027be74b82b24ebab6b446e2fb1dbfa0.pdf?index=trueIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_77c4d3541e5f42128a446bd1478b945d.pdf?index=trueIn PDF document text
    • http://jeputujakajaj.epizy.com/the_minstrel_boy_sheet_music.pdfIn PDF document text
    • http://taruxapajosavup.epizy.com/first_birthday_invitation_templates_psd.pdfIn PDF document text