Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f413fd232bb0336…

MALICIOUS

PDF

76.2 KB Created: 2021-03-03 16:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 743e74f34d920df74595707070a12188 SHA-1: 5e4a748e2de15fcea342c02bdfedbe07d075c0cc SHA-256: 5f413fd232bb0336bfdc8cf9714f9830787200080c159041e5321afed436b4d8
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host or redirect to a malicious payload. The document body, though heavily obfuscated, suggests a lure related to product reviews, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/123?utm_term=casio+pathfinder+pag240-1+multifunction+watch+review
    • https://cdn-cms.f-static.net/uploads/4426832/normal_60244763b5046.pdf
    • http://fukiwurezopukof.mywebcommunity.org/remoxitetilefupugika.pdf
    • http://rexonina.medianewsonline.com/netgear_wn3000rpv3_user_manual.pdf
    • http://dvertsoff.ru/xosuguralagozamatotifazevtn909.pdf
    • http://robertferrell.net/valexenuwuxilalexohnh7x.pdf
    • http://tijukilebag.getenjoyment.net/herman_miller_aeron_used_chair_for_sale.pdf
    • http://fuckfrsky.com/cdc_vaccination_guidelinespb0vq.pdf
    • http://limons.space/golems_clash_of_clansogjhb.pdf
    • http://usesoda.pro/22886916086ah2re.pdf
    • http://manuximaxemeje.scienceontheweb.net/bezevefojovidu.pdf
    • http://momentikshop.space/gun_strike_sniper_shoot_mod_apk0u00z.pdf
    • http://fekevopimibun.sportsontheweb.net/run_on_sentence_worksheet_key.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wozimape.onlinewebshop.net/logitech_mm50_instruction_manual.pdf
    • https://s3.amazonaws.com/xofalepelala/tnis_beira_rio_plataforma.pdf
    • https://s3.amazonaws.com/kudufigunabi/63977416646.pdf
    • https://s3.amazonaws.com/sonutopexaramuf/tigadisel.pdf
    • https://s3.amazonaws.com/gixawetopoli/battledogs_2015_full_movie.pdf
    • https://s3.amazonaws.com/dukajevo/bandana_day_information.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_off0000eb5e.bin
577b0d7665f6561eac9306d0b3f604386dfa6207ee297291b9414198c6f7dc02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 6072 bytes
font_01_sfnt_off0001000b.bin
5df30b3a34aa118f6f21c815530921fa1330aa5d91f0b4af81f1a4fdbc64efd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1000B 10260 bytes

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