Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f14082ae17e32b…

MALICIOUS

PDF

55.7 KB Created: 2020-11-13 10:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 58153a19e021f225d34d28bd5c9a977c SHA-1: 91e140811223982be451ebd3b27cb474f8bf73e4 SHA-256: d1f14082ae17e32b2b6f139039f1e5f24854b4ff9d3afd1b45169901b82c0d04
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one to 'trafftec.ru', suggesting a link farm or redirection mechanism. The presence of PDF_SEO_LINK_FARM heuristic further supports the idea that the document is designed to drive traffic to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/123?utm_term=dr+berg+7+principles+of+fat+burning+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417669/normal_5fa4505b30d31.pdfIn PDF document text
    • https://mudodawi.weebly.com/uploads/1/3/4/6/134653299/5292432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_5fa275176b955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f8cf1431a369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_5f9cb79179c83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f984c3e6a7ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f97e223c49d8.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/f08615a2-67e8-4cd1-89b1-e2e8a4bce53c/wekufivovidadidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fbd7b42-f1eb-49e2-a9fd-a1d777fa03ec/2007_altima_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccd3418-1436-4448-9d31-0a87ddd30bf9/bigeraxukirojepadibazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f680d27-32b0-444d-9f6f-21aab9a8283d/24427783740.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_off0000a3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D9 5540 bytes
SHA-256: 7d4179eb4cb8305dd36b69804b3e9c731c6490044b23aada8a1c1609d6b8afdc
font_01_sfnt_off0000b6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C5 8144 bytes
SHA-256: 1967557013af021533e846578eb41e8a93783c67eacad5fe49622000977837dd

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