Malicious PDF — malware analysis report

Static analysis result for SHA-256 79aa60149fca2ab4…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 15:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de3ee8fe80aeca6d11272b5f487b6aa4 SHA-1: 54d35d548e084c0cc5423d559431d1e9dbba4f9f SHA-256: 79aa60149fca2ab449b5b205f533af92d9c866ecc457332709c6ad666c46c552
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a lure page disguised as a repair manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=john+deere+l108+repair+manual
    • https://cdn.sqhk.co/zodavujera/jth9aZN/battle_royale_survivors_download_pc_without_epic_games.pdf
    • http://cetop.xyz/all_sad_shayaridzzxt.pdf
    • https://cdn.sqhk.co/sapugelezuf/bicichd/zegisotejuke.pdf
    • http://rineset.xyz/21494801425okvue.pdf
    • http://gavowobow.iblogger.org/rafetatobipijifabopofimi.pdf
    • http://sexesex.site/rumutakilukiputasoronaburczdj.pdf
    • http://mosovonetuvu.iblogger.org/netox.pdf
    • http://itfamily.info/54716014325rissc.pdf
    • http://shoop-fg.ru/jim_stoppani_shortcut_to_sizeqleq6.pdf
    • https://cdn.sqhk.co/vemudumuxixu/gCr2Igi/tasedulosefi.pdf
    • http://zanartcc.net/415084218570yzqt.pdf
    • https://cdn.sqhk.co/bitowiso/fA7hgih/mulotipezisimu.pdf
    • http://circulyarkadigital.xyz/certificate_of_residenced9cmg.pdf
    • http://tricitysikhs.com/sevafifad1u91.pdf
    • http://getliterate.online/firex_smoke_alarm_1240c_replacementnfxpd.pdf
    • http://formverifiedbadge.com/what_is_rational_decision_making_in_managementhpazm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kokibitumoxa.epizy.com/magnesium_ribbon_experiment_lab_report.pdf
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_2673462ab7f04286bc443c51147ccdc4.pdf?index=true
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_5336c28ac72e4d9d960b245f1364c1bc.pdf?index=true
    • http://lapamapifutul.epizy.com/27261148053.pdf
    • http://tujefuguxofela.rf.gd/lab_attendant_answer_key_evening_session.pdf
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_23ed28768e6f41539dd634c0e071f44e.pdf?index=true
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_78acac876ece47e78cfd93bcb67bc5ce.pdf?index=true
    • 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_off0000f4c4.bin
c0f21f527399c087516582d30489ef9827deda98baa7a5c7f76040e93138109b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C4 5400 bytes
font_01_sfnt_off000106f7.bin
29bd68db2fc5f6506b06ec768fdeae509c9b5ccfecbdf777359850c4402649f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F7 11328 bytes

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