Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b9c95670229e53…

MALICIOUS

PDF

80.4 KB Created: 2021-03-22 21:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3940ecbc721630c8fa842b1fc190cd9 SHA-1: 27b8bd8599425ac202a58f5949957dc544ab622d SHA-256: e3b9c95670229e53a8770df40b16a67907faf74e3b3060626d51614c419cdeae
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm on disposable hosting, pointing to numerous URLs. The embedded URLs and the nature of the heuristics strongly suggest this document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=chilean+winter+rainfall-valdivian+forests+plants
    • http://radanews.site/52078535247r9wjb.pdf
    • http://vefavirona.22web.org/2000_toyota_tundra_stock_stereo_wiring_diagram.pdf
    • http://idealica-it.website/13208201785rhsxy.pdf
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/5083eecf63a.pdf
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/4165238.pdf
    • https://tumunuwixa.weebly.com/uploads/1/3/1/3/131384432/viliwuvazeje_pipofinujuri.pdf
    • http://gafabotipunofu.mywebcommunity.org/fupeme.pdf
    • https://rafafokisot.weebly.com/uploads/1/3/4/7/134738004/tipibiludamew.pdf
    • http://serdyukov.pro/bulletstorm_full_clip_edition_om_nom_nom_trophyys89c.pdf
    • https://cdn.sqhk.co/fiseguvugele/e5sjhhf/prawn_twisters_near_me.pdf
    • https://cdn.sqhk.co/negixakozaxu/icqhajd/34624191058.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gekolutewubel.myartsonline.com/importance_of_arabic_language_in_islam.pdf
    • http://dufatiji.rf.gd/lic_jeevan_akshay_189_proposal_form.pdf
    • http://mekasesajiw.onlinewebshop.net/57928590346.pdf
    • http://volajigatume.epizy.com/47862763871.pdf
    • http://xumuritikoxuk.myartsonline.com/44095992946.pdf
    • http://gepikadagutuv.epizy.com/how_to_analyze_5_point_likert_scale.pdf
    • http://vekamujibatebig.rf.gd/zodet.pdf
    • http://likasiz.epizy.com/decimal_computation_worksheet.pdf
    • http://nutimuratibuzur.epizy.com/tasululisalavugorizuwan.pdf
    • http://ginowane.onlinewebshop.net/watch_twilight_breaking_dawn_part_1_online_free_streaming.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_off0000fad0.bin
d92316bebe069b0040a59fef8720b36dfd6c02b706cedf6c2e27c1a902ab373a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 5220 bytes
font_01_sfnt_off00010ca6.bin
fb11e503cebf7370cbbf3ab6aabd870002b94751c150ddb215b1114175759982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA6 12072 bytes

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