Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ce2bd3e4314bbe…

MALICIOUS

PDF

74.5 KB Created: 2021-02-01 21:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3cd7a4c9d8da75d7d320bc9b911c93aa SHA-1: e79673680ba7f4e9a1d0968406722d40eacb752d SHA-256: c6ce2bd3e4314bbe513e390c8608597c9a4526551e434a6eccce510a1a7ef80f
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. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to reference a celebrity to entice clicks. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful 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://maypoin.ru/123?utm_term=macaulay+culkin+who+is+he+dating PDF link annotation
    • http://winoorama.site/razorokagfb53l.pdfIn PDF document text
    • http://kyponnik.online/don_juan_canto_118cof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_6013c9e47a7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482188/normal_5fd1e70b99e4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5fe7f5485a683.pdfIn PDF document text
    • https://cdn.sqhk.co/tikugosedik/iheggf0/ps4_pro_vr_games_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418746/normal_5fca375540073.pdfIn PDF document text
    • http://aycotoro7.xyz/396506118581mhdw.pdfIn PDF document text
    • https://mimifutugeteze.weebly.com/uploads/1/3/0/8/130874087/jotizemated.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476590/normal_6003dcd9a5d91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fe5341d5b262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478923/normal_5fccfc3c614d2.pdfIn PDF document text
    • https://cdn.sqhk.co/japexexuko/Ihbjcij/zegemenefiwulowo.pdfIn PDF document text
    • https://katabeguravaka.weebly.com/uploads/1/3/1/4/131407194/pisusaxim_tizigofux_kenunez.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/Fhbhgd8/18524689423.pdfIn PDF document text
    • https://pujibotawajifuw.weebly.com/uploads/1/3/1/3/131379639/nuluriwu-kavutunugakekof-vutovo-nowotana.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/d9jdaWy/game_maker_studio_download_pc.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/fb4d5e.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/jukoxisojow/deep_sleep_guided_meditation_michael_sealey.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_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 5368 bytes
SHA-256: 359bffa81e0accf2dd0976ba955f0a9ee7cd8f58ac2051924b2265715df47c3e
font_01_sfnt_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 11548 bytes
SHA-256: 6923db5551bc677d09a679b5d6df0faf7a80fcfcdf64444bd720d58a8ca047d3

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