Malicious PDF — malware analysis report

Static analysis result for SHA-256 e041bbf77f27753c…

MALICIOUS

PDF

93.9 KB Created: 2021-02-27 18:16:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6aeff579ec04d6758f16f65402eecbc6 SHA-1: 56b5a69becfcecb2570ac93301d9f4f4bad544f2 SHA-256: e041bbf77f27753cfbde0a420a0d43750ba3d951386fa61ba42950baac0755d1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The primary external URI points to 'https://mezovuduw.ru/award?keyword=how+to+buy+an+elliptical+trainer', which is likely part of a phishing or malicious redirection scheme. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

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://mezovuduw.ru/award?keyword=how+to+buy+an+elliptical+trainer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445107/normal_600476856809c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_5fe60c822d8c3.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/jcIiegf/am_word_family_mini_book.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/fNEifge/85270812418.pdfIn PDF document text
    • https://zegesunipatobas.weebly.com/uploads/1/3/1/3/131379774/fejopow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476147/normal_6004e1f741e69.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/hb7hahc/dragon_mania_legends_all_dragons.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/eD939ev/fox_deportes_2_en_vivo_por_internet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450513/normal_601a6acf81c6e.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/KXpZjfk/top_healthcare_marketing_agencies_in_nyc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5ff239ea15caa.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/3706478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418184/normal_5fd96afdba07a.pdfIn PDF document text
    • https://cdn.sqhk.co/zimofuzam/Khbjfjd/free_things_fresh_giveaways_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_5fdaaf2dc5472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_6011e4a39ab73.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/ggiheIq/54918967178.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/0Jhe7ia/27739888600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_60200a9021e7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001343a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343A 5044 bytes
SHA-256: 38774941e87eb5a3c41d8d48336b4eb96210b7db32595708364056553107b761
font_01_sfnt_off00014584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14584 10764 bytes
SHA-256: 044445473d30bb16639fd8617f190d26c28d3ca9370dfb75f642cd9d75b5b876

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