Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4e790bf79e006a…

MALICIOUS

PDF

75.0 KB Created: 2021-02-21 08:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a97daac1ea5deb5447a98d3728e9fa54 SHA-1: f1307a3e381fed474e86844d8af962d8aff3ea0a SHA-256: 6f4e790bf79e006ad313bee2617d03279451d30536fc455f0077392bc5e268b9
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs, particularly the one pointing to 'baarspo.ru', suggests the document is part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to trick users into downloading further malicious content.

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://baarspo.ru/strik?utm_term=white+wolf+werewolf+the+apocalypse+pdf+downloads PDF link annotation
    • http://funusiwevig.22web.org/45896078269.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/CVlRjfL/weropativarubikurojadepe.pdfIn PDF document text
    • http://itasda.online/91197633382p9ehl.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/RGJgjgf/xagejegufikepeg.pdfIn PDF document text
    • https://cdn.sqhk.co/senosekagoko/f4wgdFE/battleplans_best_hero.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/4hijfic/malayalam_instagram_videos_for_whatsapp_status.pdfIn PDF document text
    • https://nunofisodopuw.weebly.com/uploads/1/3/4/2/134234763/wugugonomesep-jilosukak-sivipefodaren-xutapeziwi.pdfIn PDF document text
    • https://xaxepilote.weebly.com/uploads/1/3/4/2/134265473/9294116.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/gewilu.pdfIn PDF document text
    • http://storeplus.pro/teamviewer_12_tamindirkem5g.pdfIn PDF document text
    • http://idealicaitalia.website/the_gangster_we_are_all_looking_foroz55r.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/bezorito/18073062333.pdfIn PDF document text
    • http://divojeniro.epizy.com/counter_strike_source_free_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/anydesk_portable_p30.pdfIn PDF document text
    • http://tajazeruviv.rf.gd/46183402426.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/w3schools_html_quiz_answers.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_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 5448 bytes
SHA-256: 079c03905b0e1dcc178539cc04cef1119bf3c7bdb0b4ac062acd0a5f16f65cc4
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 9972 bytes
SHA-256: ef1c4765e83410d2dc705c23817d5e783e8923bc470ca93379f21e7422534b83

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