Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b48eb1ef0f0abd7…

MALICIOUS

PDF

79.1 KB Created: 2021-04-29 04:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41ffe0f1df00a1768ffea9cf76cb60b9 SHA-1: a3636a8f92be21732a92979cf251ddb79300ea4d SHA-256: 9b48eb1ef0f0abd7ecd338883b93d4a035972f39572c0dae898eb498e4a56457
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 URL that directs users to a suspicious domain, likely for credential harvesting or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious 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://vilenefex.ru/strik?utm_term=how+does+a+magnetic+resistance+exercise+bike+work
    • http://jekeluxuto.mywebcommunity.org/devafaru.pdf
    • http://ruguwafe.scienceontheweb.net/14616134177.pdf
    • https://cdn.sqhk.co/powirafawume/ji2himJ/music_player_10_band_equalizer_pro_apk.pdf
    • https://cdn.sqhk.co/reparepoki/OietVX7/iron_superhero_strike_battle_royal_war_shooting_stars.pdf
    • http://wanididezaj.getenjoyment.net/gomupese.pdf
    • http://tanijijud.sportsontheweb.net/13651340171.pdf
    • http://dirujadejefogax.iblogger.org/google_academico_livros.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/paropabaru/neziderefujenefo.pdf
    • http://wavanak.epizy.com/bad_blood_book_reddit.pdf
    • http://pubadaxakefiwi.rf.gd/givofivubalerunip.pdf
    • https://s3.amazonaws.com/geradi/armani_size_guide.pdf
    • http://zemagarekerak.epizy.com/gudulemufedefefusalaxe.pdf
    • https://s3.amazonaws.com/wukevirenesu/topaxezakivilesusewa.pdf
    • http://poxemibusap.epizy.com/90832612702.pdf
    • http://xetisovabad.rf.gd/43620204167.pdf
    • https://s3.amazonaws.com/xalasawu/11406841596.pdf
    • https://s3.amazonaws.com/jesidofefe/graphic_design_essay_topics.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_off0000e90b.bin
e63c519408091dcc874b6340b82ec24f11d996a79357334b872002ad727144af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 5340 bytes
font_01_sfnt_off0000fb32.bin
4ad58aef0ae7d9a685cd9d1749ce18e0a06cd059560e4d022275a1b7e9db2c35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 11416 bytes
font_02_sfnt_off000120bd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 4324 bytes

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