Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24c18aecc178685…

MALICIOUS

PDF

81.1 KB Created: 2021-04-12 03:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d62b6f23fe360837ff6e5e7edd1644ad SHA-1: e457270ccc25f48ab0cadf1ef56cd70095b193dd SHA-256: f24c18aecc1786855e90ea9a6e9f82770f09de4675804d11d8ef6f13415ec8b2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL associated with a phishing lure, disguised as a grammar PDF. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests an attempt to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/strik?utm_term=12+verb+tenses+with+examples+used+in+english+grammar+pdf
    • http://tejidirexe.mywebcommunity.org/rusazuwivideriwebemigurud.pdf
    • https://cdn-cms.f-static.net/uploads/4467577/normal_605bb97ed6d70.pdf
    • http://gixipures.sportsontheweb.net/increase_height_exercise_after_18.pdf
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/8780508.pdf
    • http://worabipupe.mypressonline.com/esl_interview_questions_and_answers.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://reflectionss.space/powerflex_4_error_codes0ezqi.pdf
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/4298253.pdf
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/jadagasus.pdf
    • http://helper-badges.com/xupufatefolufopusemabomapc1z62.pdf
    • http://auth02mobility.com/95217706413jnzi8.pdf
    • https://fogovuraperikog.weebly.com/uploads/1/3/4/7/134713912/nobako-saxuw-zutusinag.pdf
    • http://rojibitakuvekuw.scienceontheweb.net/calisthenics_exercise_guide.pdf
    • http://aires.fun/how_to_create_an_equilateral_triangle_in_a_circlestwr1.pdf
    • https://static.s123-cdn-static.com/uploads/4481270/normal_6008b91f4855f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://retiziwo.myartsonline.com/modern_arabic_language.pdf
    • https://s3.amazonaws.com/lokijuronig/icloud_bypass_activation_tool_v1._4.pdf
    • https://s3.amazonaws.com/bibejovixapis/firex_smoke_alarm_model_g-6_manual.pdf
    • https://s3.amazonaws.com/sugosubexez/63030653758.pdf
    • http://lolunoxij.myartsonline.com/biaxially_oriented_polypropylene_bopp_film.pdf
    • https://s3.amazonaws.com/wemazun/terminator_dark_fate_official_trailer.pdf
    • https://s3.amazonaws.com/nakuzafol/why_is_my_sense_of_direction_so_bad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c5.bin
de4307721169696796d3c74d0e7842e9dcf8c5dfea729a4bb01be11c9a823def		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 5676 bytes
font_01_sfnt_off000103ea.bin
3b676f1631144d9ee2df0b2233d8efea2b26b092c95920ef0627a5bbe113dd51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 10780 bytes
font_02_sfnt_off00012899.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12899 4324 bytes

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