Malicious PDF — malware analysis report

Static analysis result for SHA-256 293375482a44cb0b…

MALICIOUS

PDF

73.3 KB Created: 2021-01-01 02:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 34cce799f1f39f9de292dbbde32951ef SHA-1: a8239f53e837bd185a861a5cf852fb65116b7ed8 SHA-256: 293375482a44cb0bab3f4554162e40735c2e6eb55dff08af0aeade54100a1e78
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a significant number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or malware distribution intent.

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://trafffe.ru/strik?utm_term=rope+to+wrap+pole PDF link annotation
    • https://tolazekujulom.weebly.com/uploads/1/3/4/6/134668849/ac5b1eeff1f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446635/normal_5fa6e897e1ec1.pdfIn PDF document text
    • https://gabinabadebaxir.weebly.com/uploads/1/3/1/4/131408928/pixevamakod_zosatopowerem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5f8c74f60b43b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f9d3b9823251.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a44af014-e05c-4f2c-8e4a-66412ab10442/18838575038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8300ba-95be-4563-8a7c-f8d3b55e85f0/sherlock_toms_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0f702a-da3c-48e0-a656-309bb80698ac/vuregopara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962fade6-ad21-4934-bcac-824df336eea1/87421679155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1336bfc-9cd2-4549-b20a-fdb67d62200a/72057595552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a82066-d0f8-4854-9693-a77e8ec7131b/78892872593.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C4 4368 bytes
SHA-256: 66ea64b6e54fb92eae08ee0902cf7a0d26d44ac32ac176a62c8043bae5511694
font_01_sfnt_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 10792 bytes
SHA-256: 16dd11cc06a3af9634477cde69cc7cd150fb712c852458d2d0d7322175cd058a
font_02_sfnt_off00010a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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