Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e816fb299fc2fa8…

MALICIOUS

PDF

65.4 KB Created: 2020-11-10 20:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 76dedaf013fa3c7468fcf8bf79a664d5 SHA-1: d05d20ab7a0c9cf189998b52d735d199b1621a5e SHA-256: 4e816fb299fc2fa8817b202f3bbd55dbab6265c5767279be764beeadf6ac486f
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 0.9998

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://traffnew.ru/strik?keyword=arif+v+216+tek+part+full+izle+tek+parca PDF link annotation
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/mabaledaxuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_5f969c499dd7e.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/6c133da.pdfIn PDF document text
    • https://xuxewisi.weebly.com/uploads/1/3/4/2/134235501/fonudedis-nutiweki-tijegedukojo.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/panalipolifod/31853125160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81504bd-fba0-4cfc-8da4-9959426fa018/27501625360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a2cec7-9de9-445a-bbcf-21cf101896e1/gesamufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e846d15-9362-4146-9bff-cbe948583b67/geometry_special_right_triangles_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6699b9ad-d11a-4ee6-b164-13d4a9449bdd/do_you_change_your_apple_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8efdbe8-303a-4ace-8c28-46bc842b8027/tiger_rag_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58890fde-ed04-4f73-88c9-8ca7484a75ec/42892831664.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_off0000c1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CD 5332 bytes
SHA-256: d36361994f84e6ac50f5ca98b00cbd819aa17b3e781a904fdb7c148345d89607
font_01_sfnt_off0000d41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41D 11332 bytes
SHA-256: fa1d76d12c00d6472a00d419c4f89aac8852bf71b5f3a6de34cf4e708d62173d