Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3ddf21e86124ef…

MALICIOUS

PDF

81.6 KB Created: 2021-03-02 04:24:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4452da70ffc61b8d67ff1cdcb15f4fcb SHA-1: 04969e75d10f7a4e2dded50c95ecab3fb873e440 SHA-256: 2c3ddf21e86124efeb44fb118f8d4883443c93e8d955a6020b9d47149809a688
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The presence of an external URI pointing to 'vilenefex.ru' suggests a phishing attempt or a download lure. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext, indicating the document likely contains urgent language to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=nostalgia+ice+cream+maker+vanilla+recipe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421038/normal_603d193ac3686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423700/normal_5fdc44c8533c0.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/Qrjejig/25710418913.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/V8ijejd/health_science_journal_impact_factor_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/eGTphb6/roku_account_suspended_error.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/SVBhgit/parents_kit_whatsapp.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/icdPvn6/xufamowudazirin.pdfIn PDF document text
    • https://cdn.sqhk.co/ninubisidire/hsJiid8/dragon_city_heroic_breeding_time.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/aFkl1Ua/5646992002.pdfIn PDF document text
    • https://cdn.sqhk.co/delobepaziw/gjjczgj/vabunimirorisa.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/eQBaigQ/61303177361.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/fjbibpt/skype_international_calls_free_trial.pdfIn PDF document text
    • http://minuette.me/fuloradunifijukepumihj.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/bjgJBjc/balloon_tower_defense_5_android_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://medetoti.epizy.com/15679125694.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/6335722401.pdfIn PDF document text
    • http://gezupipul.rf.gd/mifumosorokesazojexag.pdfIn PDF document text
    • http://rikovaniroxatox.rf.gd/wavizotezaneselefori.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 5348 bytes
SHA-256: f246dbba40a1865b9dc3abf9a45a4803864f39e9781cc17789edca5415079290
font_01_sfnt_off00011292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11292 11368 bytes
SHA-256: e8c34de7f3259c7f59fb6d28c77dc5484b78ecf99523e8725d0c3f322970ad7e

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