Malicious PDF — malware analysis report

Static analysis result for SHA-256 79401529066bdca5…

MALICIOUS

PDF

76.6 KB Created: 2021-03-30 01:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35b127dc3a229c108befc46064d56a2e SHA-1: b183b5d64080da22dcee413c7fa9f9b338cfe338 SHA-256: 79401529066bdca5e0ad16b94ab04097fdd6e415018302f2093f1796f17d465a
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'ponafet.ru', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious resource. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URL.

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://ponafet.ru/award?keyword=ccat+test+pdf
    • http://mavitrade.com/cassiopaean_transcriptsloq6a.pdf
    • http://it50disconto.info/85093157388gkmbl.pdf
    • http://jofufunobek.sportsontheweb.net/what_are_different_conflict_resolution_techniques.pdf
    • http://icub.tech/wakisufozojezubuzopomepbpdee.pdf
    • http://erogan24.website/after_we_collided_sequel_booktpxv1.pdf
    • http://kigirifaduguv.getenjoyment.net/murder_on_the_orient_express_book_plot_summary.pdf
    • http://shoppermarket.online/97154565982vtmnn.pdf
    • http://triple-doska5.club/jixagofunuvedunopjmmdg.pdf
    • http://voztrans.ru/3994467597d1ay7.pdf
    • http://natlegend.space/5701115913le3s1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wujafivabipo/black_desert_mobile_quest_guide.pdf
    • https://uploads.strikinglycdn.com/files/3673f361-4a02-4d58-895e-8438976b17f9/how_to_put_pictures_on_iphone_apps.pdf
    • https://s3.amazonaws.com/jubiferekaka/honda_maintenance_codes_a127.pdf
    • https://s3.amazonaws.com/rezugekolaba/azhar_ali_song.pdf
    • https://s3.amazonaws.com/nitidadufetenu/35196643653.pdf
    • https://s3.amazonaws.com/ponivotigegepub/discourse_analysis_journal_articles.pdf
    • https://s3.amazonaws.com/bofake/how_to_fix_kenmore_washer_door_lock.pdf
    • https://uploads.strikinglycdn.com/files/4321cf55-97e6-47ec-af19-9fe3e6648bad/2008_ford_f350_repair_manual_free_download.pdf
    • https://s3.amazonaws.com/jolituzoji/la_noire_xbox_one_achievement_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5b.bin
8b5c0b703d249b3861649d5595ed89ffbc77ad239faa45a6ba7592676fb7a308
pdf-font-stream PDF embedded font (sfnt) at offset 0xED5B 4924 bytes
font_01_sfnt_off0000fe32.bin
747392ac9940c1ad0979183c523eaeba61bc45610dd34c0835c6045d136727a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 11448 bytes