Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee91b45dda22fabf…

MALICIOUS

PDF

59.5 KB Created: 2020-11-17 09:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5a62db9980001fea62c1f572193500fb SHA-1: 5be571bb33239ee0888dc85a9212b71bfd496ded SHA-256: ee91b45dda22fabf2f404c2c6f04c43c28b50dcacc95f9c6ad918af9e50c8c3d
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/123?utm_term=turk%2527s+head+knot+neckerchief+slide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f89fb86d5c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5f98b11cde399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f8759771aa92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_5fa2811d24b89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_5fab55d7ad160.pdfIn PDF document text
    • https://dukitupa.weebly.com/uploads/1/3/4/3/134393571/zolekelur_taxazo.pdfIn PDF document text
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/xemubuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475397/normal_5fb01e834f3a8.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/7901005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5f93abee61f16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fa046ef00714.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/gotenukevepunin/sinclair_lewis_babbitt.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_off0000aec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC4 5156 bytes
SHA-256: 5a847e2fe188c0b69b5f614942f7c5cd22d3cbc9f0439e668f548ece071b05be
font_01_sfnt_off0000c048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC048 9756 bytes
SHA-256: d88cdeee6ef01e493870c458c3e4a5e794daf498e4716c99a64dddaec00311a4