Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c63676b2d7b36c5…

MALICIOUS

PDF

78.0 KB Created: 2020-11-19 05:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b6b1245a1af5b8df269a167675dcc5d1 SHA-1: b1aa033af7bdb4e5447eb663ed2dff8cc090b52d SHA-256: 4c63676b2d7b36c573b35f9754e4534ff3746b9db1f670faa7759858b04e5b45
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=mafia+cards+pdf', which is flagged as a critical heuristic. ML classification and ClamAV also strongly indicate maliciousness. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is sufficient to determine the attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=mafia+cards+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6f0c98-73be-46a8-9699-2d8e6248bfee/bakitumedejabe.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/calcul_besoin_en_fond_de_roulement.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/fire_emblem_three_houses_nemesis_boss_fight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c8e32c-b3d3-4db5-97cd-d070530bfed7/sacroiliac_joint_dysfunction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d58111-384e-4ed1-888b-d5a977a88545/muziguli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9da49b-2442-46ea-827f-a0458dee1f12/small_woodpeckers_in_colorado.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/logitech_harmony_350_universal_remote_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/xovuk.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/123_streams_abc.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/92619173134.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/beauty_salon_mission_statement_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/6496512198.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_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 5120 bytes
SHA-256: f93a68f264b017761204efe4823699fe8d68cd5f11c38f30bb2fb3006cc4520f
font_01_sfnt_off000108da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 10080 bytes
SHA-256: ff27be4e5e20b55d6bc820b98cb622696f671fcdac8920247453b499e41f681a

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