Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef62d8db2d38c63…

MALICIOUS

PDF

72.4 KB Created: 2021-02-20 21:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a8bd2486b37015cf56840a900d380330 SHA-1: 79fa5fb7174137c187cd037fe6bd6fa3ea2f65bf SHA-256: aef62d8db2d38c63b84104bdc1a06a8ca495366adbabdfaf095bc83ed71230e7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=trolls+can%2527t+stop+the+feeling+anna+kendrick+and+justin+timberlake PDF link annotation
    • http://bigpleasure.ru/81770006627apk6q.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/chbhehe/buzzfeed_unsolved_supernatural_season_7.pdfIn PDF document text
    • https://voloripilobolim.weebly.com/uploads/1/3/4/6/134635915/sonofotafenal-xulukawetidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_6030d058dad84.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/jewujajawilexinekig.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/6078507.pdfIn PDF document text
    • http://cosmosqrab.online/62552709828dlc0x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_600fd80597c23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5feb09744fe74.pdfIn PDF document text
    • http://optarfes.com/vetujifawukiticsd8t.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/eoji6Iq/dual_monitor_setup_with_laptop_closed.pdfIn PDF document text
    • https://cdn.sqhk.co/sononipo/iffhdhd/87060583166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392661/normal_5fed813e31bc9.pdfIn PDF document text
    • http://gratoramaa.space/difference_between_latin_and_greek_rootshtnaa.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/fusopoxipo/word_to_adding_blank_page.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_off0000daff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFF 5832 bytes
SHA-256: 7b1fd4e7ce349c5babd39c4efdbc26c6f3c0ee2b15a0884bc34d13afa72eec79
font_01_sfnt_off0000eeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 11024 bytes
SHA-256: f1ba46a3cfb2a119d491c26b2fd1f58bf5ed6b3e8ec6bd9536dc24574060255d