Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bece199ededc64…

MALICIOUS

PDF

77.8 KB Created: 2021-02-17 22:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b1c9cb56c54d90fce816fb5e4db2459e SHA-1: 8d500751309adae08323855b1f9c9a851f3709e9 SHA-256: 58bece199ededc64fcc6e4fd477f836c7f33c68ea22dad71bf2c6a4827e4d9b9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or SEO spamming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=garmin+gps+60+new+price PDF link annotation
    • https://cdn.sqhk.co/pezolaje/ifYYMk6/dojugotidoniluviba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_6011037134f90.pdfIn PDF document text
    • http://jumuzonogajal.iblogger.org/50595244566.pdfIn PDF document text
    • http://requiremcgood.com/sibeteveresich7z8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375698/normal_5fdca94b56525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471230/normal_5fe3980dce39e.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/dokebewud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_5fea27c99ea68.pdfIn PDF document text
    • http://hookup154.site/acid_derivativeswsoob.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/geraromu/fizefevabemusimibizabije.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/rogejavavan.pdfIn PDF document text
    • http://labazorev.rf.gd/warabegokasimatugef.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/88365213591.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/arcgis_collector_cannot_map.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_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 5640 bytes
SHA-256: 21bfb7d1a46c2e34760d2541f99958426d5097ac3db4f2c3ef84a735fac9571f
font_01_sfnt_off0001062c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062C 10656 bytes
SHA-256: 9c8ead318b98b0aa7fc80818be5ae131f2ccda951a761fcd926e413aaeb4b558

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