Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ed29f5abef21ec…

MALICIOUS

PDF

61.9 KB Created: 2020-11-13 18:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cdbcdf382833207615aa01f4c668b59e SHA-1: 1f9d128b4ec2ffcf2660dc59c3115b31f2afde2d SHA-256: a7ed29f5abef21ec5cd9e9bbfd58ceeffdd6c5549675b13dc53460af14e962d0
156 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL pointing to 'trafficel.ru' which is flagged as suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute content or redirect users. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=dark+souls+3+dark+hand+pvp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5fa6bfa71858d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f97975440707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5fa4800bc2f38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f8d6c4ba0737.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/8809179.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/47865602576.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/darkend_skyrim_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65beda1-6284-4395-b96b-b4953a0e4c35/59046258253.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/sbm_2020_annual_meeting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8f690a-2d3d-44cb-bd45-3d4ba1de26f8/barufirinidubiduf.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/margaret_atwood_masterclass.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/xadova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7eb190-240e-4f4e-8c9d-62bbdd487f5c/titanic_by_david_slavitt.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_off0000b42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42E 5336 bytes
SHA-256: 908fe821515df3f7677587a508b987bc3748fb568141d222ea54577c4ada3c6b
font_01_sfnt_off0000c659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC659 10764 bytes
SHA-256: 26d4e83eb3410fb22f75b4533ba9102a5b8be06df716667a72b1172d47a18fbd

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