Malicious PDF — malware analysis report

Static analysis result for SHA-256 081926fd7d448391…

MALICIOUS

PDF

78.0 KB Created: 2021-03-21 21:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 585bc17b643e3e7dc4e51e8a053e190a SHA-1: ea7249ff14841eac32fdfd7e474f410c995a64ce SHA-256: 081926fd7d448391ef6e39126506636bac63aa919c8e32e876ab1662a4671e05
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm structure, suggesting the document's primary purpose is to redirect users to potentially malicious sites. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

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://botokaw.ru/strik?utm_term=nikon+p+223+3-9x40+matte+bdc+600
    • http://krokoboko3.xyz/574190164725iv24.pdf
    • http://toppiksnack.xyz/kigudotikamatorupuwovkqz8.pdf
    • http://xilenemivagola.mywebcommunity.org/13790725517.pdf
    • http://monongzhlh.space/why_is_my_bt_router_flashing_blue3djwp.pdf
    • https://jotozured.weebly.com/uploads/1/3/4/5/134588142/1496345.pdf
    • https://rezepurobej.weebly.com/uploads/1/3/5/3/135327696/572f46.pdf
    • http://bitcoins-profits.com/30539051934iv57d.pdf
    • https://gesofomudejow.weebly.com/uploads/1/3/4/3/134344239/lafidibuwasi_jonatibixoginon_muziduru.pdf
    • http://raffle.website/905803590894swgg.pdf
    • http://coolstudent.space/lg_wade_organic_chemistry_9th_editionkwbsv.pdf
    • http://itdiscount.pro/college_algebra_problems_solverl74o3.pdf
    • http://uscreditreport.info/gifidojefv5dfh.pdf
    • http://kmplitka.shop/dofafibivarufipuloposoruebixk.pdf
    • http://nageramuvepom.mywebcommunity.org/66924318804.pdf
    • http://sportplays.ru/464608980995thle.pdf
    • http://siwosupegejolop.medianewsonline.com/potafisorokuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fogovulosuzan.onlinewebshop.net/lubumiranerimofixujiv.pdf
    • https://s3.amazonaws.com/fazujo/zurosirulozef.pdf
    • https://s3.amazonaws.com/wizitifowubux/annotating_informational_text_handout.pdf
    • http://nimanexobubibub.onlinewebshop.net/how_to_use_the_oster_bread_maker.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e4.bin
f0cbb5927fc72715ad83584a8a246861982fde14b42737e4fa8daf1ea80f3fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 6020 bytes
font_01_sfnt_off0000fc5e.bin
b89ee173a2363fc2372c60a7870b381703dab6ffc2138a9f9615e8e7b35b3d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 14828 bytes

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