Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a32784d04ec1b7a…

MALICIOUS

PDF

71.3 KB Created: 2020-11-24 18:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a1d8a66c678dc31ab64bb18e5084b2ff SHA-1: 79df4546d48cb0c6178a2e117768a80955580552 SHA-256: 3a32784d04ec1b7a0807071abff3464f55b210a0c1a05f80ec0af753c8794c55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a mass external link farm, with the primary suspicious URL being https://traffset.ru/aws?utm_term=proses+diagenesis+pdf. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://traffset.ru/aws?utm_term=proses+diagenesis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447096/normal_5fb5e8f6ade38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_5f97516d09ec5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_5fab7d2eb6ce7.pdfIn PDF document text
    • https://papekukikaduli.weebly.com/uploads/1/3/4/3/134361343/gavewivom-jidamujetenor-sefadakunudimi-pogupabir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f94ded3e7a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_5fb73f98ab132.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/luvusunovinev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408593/normal_5f943539df20e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8404d25-a9f1-44e5-bfaa-db17aff1abd5/75557509939.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/vuwabekiwob.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/pidisavokoz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA36 5176 bytes
SHA-256: 8093548ec40dc5b4124b0cef498b1c348ece6ba4aa59b0950ac1c092842d07b3
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 10340 bytes
SHA-256: 67ae3ab3642590445f89f892bb9545dab701a332f6535894d68d0b2b64f79286

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