Malicious PDF — malware analysis report

Static analysis result for SHA-256 4531df0c32b96ab2…

MALICIOUS

PDF

64.4 KB Created: 2021-01-05 05:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3a7ded585ae18a8612d3e3c698914b5f SHA-1: 977dce9b23a8b51a3e70de616c9db4ba8e69790b SHA-256: 4531df0c32b96ab236f87c988d876f1966d05e74457ea464b02ec550c47233af
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to sales, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=long+nets+for+rabbiting+for+sale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486743/normal_5ff01ac97e22b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382196/normal_5fc7ee0ce2b45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f90eb971a74a.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/cA0nJgh/95526954706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fcd0b0b96388.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/L0jgTW4/movielogy_movie_trivia_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_5fbdc168a0456.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/ritoma/71636788441.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/rugixewavuwadetunuwixu.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/fleetwood_town_fc_ground_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/zotedozitazak.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_off0000bf0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0B 5016 bytes
SHA-256: b2619095854295f43c4301611640b609ab15bb72e3623eab09d2eb964da9b1ab
font_01_sfnt_off0000d036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 10768 bytes
SHA-256: 1dcedef1ee779db919f93c95aca8807f0956f1c0eb6f6804cc569af008e5db27