Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75c01f7046514fc…

MALICIOUS

PDF

73.6 KB Created: 2021-06-02 00:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7f38e9a9584f5df0e7f4526591f767a8 SHA-1: e0e115022790de6fd12fcac383cd1ce50c10c292 SHA-256: f75c01f7046514fcdf59da64d7c70282f7b824de176b89e91e8b0588880e3b5e
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary one being https://seumenha.ru/123, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to financial reporting, likely a lure to entice users to click the malicious link.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/123?utm_term=conceptual+framework+for+financial+reporting+ifrs+2018 PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4370087/normal_60b19f6a17e04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_603b20fa11a74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_5fc93d2cb192c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449614/normal_5ff6b85a3a925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382631/normal_5ffa30ee51106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484093/normal_6066eabc01354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_602862969c2e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460042/normal_5feda29f68018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_604cc5704182a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_600d240b7c6f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5ffb4fb757ec0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_601ab74442fb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144424632/hoi4_uk_multiplayer_guide.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144412476/12513251710.pdfIn PDF document text
    • http://pagorevet.pbworks.com/w/file/fetch/144480492/how_to_get_pbe_account_league.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/reach_compliance_statement_template.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144428970/what_size_rug_under_baby_grand_piano.pdfIn PDF document text
    • http://mukonisu.pbworks.com/f/percy_jackson__the_olympians_the_lightning_thief_full_book.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/como_ler_livros_online.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_off0000df52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF52 5916 bytes
SHA-256: 82ff3477e9252416c0d69745e3c8d44953a2981c66f95686963191222dd38e15
font_01_sfnt_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 11216 bytes
SHA-256: 45a8e42a024be30551a4c5a68b428fb8e69c51a694144758fae542d95862545e

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