Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d575fc60b97e58…

MALICIOUS

PDF

64.1 KB Created: 2020-11-09 22:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c717742f3e08a754093253f5833fa9b7 SHA-1: 789020e8cdc7fa83f29122965a6cb9aeb3ae26c0 SHA-256: e2d575fc60b97e5876cb348124625024c848b2fd2afb969b76a4de3783d25679
154 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains a critical heuristic indicating it's a redirector link to a known malicious URL. The embedded URL points to 'https://cctraff.ru/aws?keyword=leatherwork+merit+badge+worksheet', which is likely used to lure victims into a phishing or malware download scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/aws?keyword=leatherwork+merit+badge+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f881e31ce6ad.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/5430566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5fa5599f474f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5fa703f0eee0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8c527ba3288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f8f755e296bd.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/toxewodipukaf-xosewaw-nogeledufapenew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f9603d15f40c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f86f50532aed.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/wogovanesofiz.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/c139ea12-6132-4a80-abd2-3ebc5a66a87d/92391681137.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_off0000bdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF3 5444 bytes
SHA-256: 1b917dad580ef1d6eaa11e2be4cdc2db8a690129216445acbcf9b26f2703cc70
font_01_sfnt_off0000d05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05C 9940 bytes
SHA-256: 890e17402349967f30100ed93031770b1eeef52668ecbc0e72620d26cd15b918