Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f17d21162449c9…

MALICIOUS

PDF

63.1 KB Created: 2020-11-25 17:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ec7e949dffb95cc3eb24f78c38be57d7 SHA-1: 3a3fdc9a36868ca152ad84cca419d8427706165d SHA-256: 05f17d21162449c96964af1e74451efc85768faf54e2fcbe47dfbbb6a4c75fe1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, with a significant number pointing to Weebly-hosted PDF files, indicative of a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9660

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
  • 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.
  • 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://trafffe.ru/strik?utm_term=canon+powershot+sx150+is+manual PDF link annotation
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/a170e51eb096.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/vaporatepupexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_5fa39e78bf68c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fa9e32e29b6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5faeedb854da5.pdfIn PDF document text
    • https://rabebazenapaju.weebly.com/uploads/1/3/4/7/134771608/5660756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_5fa10ed2c149e.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/bed7f4.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/apa_style_6th_edition_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c5b8eb-2528-487b-8dd9-551027f61037/sejulax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81a56ee-c4ce-46bd-9647-a3472840d716/76543073901.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/father_anthony_ochoa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386a89cc-c61d-4636-91ae-7035bc62fa53/35161104170.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE402 3724 bytes
SHA-256: ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa

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