Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0452285e911101…

MALICIOUS

PDF

82.5 KB Created: 2021-03-03 07:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 53d1ded3d64f3b9d5f6b8855e4b81ae7 SHA-1: 30997cc0e7952260881fabf9cb965d518df66dc0 SHA-256: 0b0452285e9111010d1c97a9a2ef3a7a1e7e012050f7b589cc3a9e13386ebaf5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=pet+salon+games+unblocked PDF link annotation
    • http://jojidasusesot.sportsontheweb.net/51892064653.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/8773056317.pdfIn PDF document text
    • http://atlas-copco.su/99367058985dengt.pdfIn PDF document text
    • http://wobirarebi.22web.org/552912178.pdfIn PDF document text
    • http://gsmall.space/merge_with_adobe_acrobat_readeranegi.pdfIn PDF document text
    • http://nudistoff.club/25797334856q5nwd.pdfIn PDF document text
    • https://cdn.sqhk.co/femelofep/OAsHShf/stickman_counter_strike_vs_zombies.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/modelo_atomico_de_sommerfeld_maqueta_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/lemusezilaz/NjdzDgo/74629971096.pdfIn PDF document text
    • http://chisto-chisto52.ru/belukikocpfno.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/32559838381.pdfIn PDF document text
    • https://cdn.sqhk.co/dokamaruxif/uwthb0f/5400825697.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/kenmore_front_load_washer_spin_cycle_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/vieheXG/square_body_chevy_dually_lifted.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://legokejapo.atwebpages.com/99098904024.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/hardest_maze_game_ever_online.pdfIn PDF document text
    • http://xovuxeke.epizy.com/6742851648.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/what_wine_pairs_well_with_lamb_chops.pdfIn PDF document text
    • http://mezotake.epizy.com/jidilifelupizelaferusifup.pdfIn PDF document text
    • http://xejipej.rf.gd/ruger_mini_14_serial_numbers_583.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_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 5368 bytes
SHA-256: f06803430ee6cfde23e5178a10f50052292d9e7246e635f59756d23f98ac1edb
font_01_sfnt_off00011a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A04 10084 bytes
SHA-256: 9173cdf99b3cb6de399aee9e2f01ead0826f3024cc1f07726b3be7352885794e

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