Malicious PDF — malware analysis report

Static analysis result for SHA-256 642f572ccb2a26ce…

MALICIOUS

PDF

78.5 KB Created: 2021-03-01 09:22:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83963104a8c0f6584569d0bd4a4d1587 SHA-1: 277c10ac723ebb1251cbf860543ca72c0bb2e95e SHA-256: 642f572ccb2a26cecece4bb4701fe5276c91a203e6910765757e6b2fa52939a3
96 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 embedded URLs, such as 'https://kuzutuzo.ru/aws?utm_term=washington+redskins+name+change+news', suggest a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting a compromised site.

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://kuzutuzo.ru/aws?utm_term=washington+redskins+name+change+news
    • https://cdn.sqhk.co/dagufiwus/eKFA2hc/kabipazexobe.pdf
    • http://wonder-ita.fun/66059050448soz4g.pdf
    • https://cdn.sqhk.co/duvetezoje/cggdgfQ/bingo_song_download_free_mp3.pdf
    • https://cdn.sqhk.co/jarixizotib/5hgieja/90737118753.pdf
    • https://cdn.sqhk.co/rarirawibowo/Rhjidha/callaway_supersoft_golf_balls_yellow.pdf
    • http://lozhobelir.space/levewadutidosanntunv.pdf
    • http://lovelyhouse.online/how_does_a_3_phase_ac_generator_work50fdc.pdf
    • https://static.s123-cdn-static.com/uploads/4480579/normal_5ffe44ea28733.pdf
    • https://cdn.sqhk.co/vivepovugeli/6hhhcJO/rise_up_lyrics_christian_song.pdf
    • http://wonder-ita.fun/2018_forester_xt_premium_for_saleci5le.pdf
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5fcdeee956f2f.pdf
    • https://cdn-cms.f-static.net/uploads/4464995/normal_5fd0f36f01ca2.pdf
    • https://cdn-cms.f-static.net/uploads/4471711/normal_6023dc0349648.pdf
    • https://static.s123-cdn-static.com/uploads/4448991/normal_5feb4194992fe.pdf
    • https://cdn.sqhk.co/duputokodoz/sIwighb/super_sonic_the_hedgehog_speed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gotijejaj/trello_shortcuts_cheat_sheet.pdf
    • https://s3.amazonaws.com/xujitezu/16407248942.pdf
    • https://s3.amazonaws.com/dutuzanob/57609454459.pdf
    • https://s3.amazonaws.com/fewunadupop/greatest_common_factor_worksheets_grade_8.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_off0000e7b1.bin
a17061df76d7a44b4b00fe74b84d02ca2561c98c15063bc4b3e585a87e6a040c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 5280 bytes
font_01_sfnt_off0000f982.bin
f249b03256b334b98611f2a1a1467c5ddba69b18d5063c36aa59f0fbba71002d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF982 10784 bytes
font_02_sfnt_off00011e70.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E70 4324 bytes