Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c79c7889adf960e…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 16:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 890e7582b19ff23659ddaf29e439105f SHA-1: 2594a7695817d7dce9c211272c8d8dda97382ad8 SHA-256: 6c79c7889adf960e323049885ffd7c6ba30a80b74d9128b2f8cd401dba1556f2
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to 'vilenefex.ru/award', suggesting a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI are typical of malicious documents designed to trick users into visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=les+caprices+de+marianne+de+musset+pdf
    • http://zdsshop.top/what_is_media_and_communication_degreetwvgz.pdf
    • https://cdn.sqhk.co/tamenotu/hcjhF1l/legion_td_warcraft_3_ai.pdf
    • https://cdn.sqhk.co/noxibogalu/hdwiavr/7820580939.pdf
    • https://cdn.sqhk.co/verinomo/ggp0hie/48861988098.pdf
    • http://baltika-trans.com/how_to_start_a_lifestyle_blog_for_beginners9banq.pdf
    • https://cdn.sqhk.co/sizozizaj/e8ljfhj/ludikesuxarifadefefabelu.pdf
    • http://tenakororor.iblogger.org/1700917892.pdf
    • http://vinnipoh.space/71988009137oszs.pdf
    • http://digtalcaliper09.xyz/24892627084k0jax.pdf
    • https://cdn.sqhk.co/wuxobilan/812zXQV/13138258984.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zasepo/nanazolezovidusivixavap.pdf
    • http://waromewozepivo.rf.gd/muritiguxokitopapiwarij.pdf
    • https://uploads.strikinglycdn.com/files/fbc75e6f-9f0a-4358-9860-b6379764bd4c/tricks_ellen_hopkins_characters.pdf
    • https://uploads.strikinglycdn.com/files/9a1fec4a-e691-460f-8ee1-9121cdeb5999/learning_c_programming_language_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/50859357-aedd-41b5-b408-baebdc33210b/maquina_de_costura_brother_ce_4000_usadas.pdf
    • https://s3.amazonaws.com/fosagobomap/76649677261.pdf
    • https://s3.amazonaws.com/dagasopones/unity_biotech_stock_news.pdf
    • https://uploads.strikinglycdn.com/files/e70c883e-c8cd-4d32-9b35-62564ebcd218/petesowobuxolun.pdf
    • https://s3.amazonaws.com/sasufufa/kugakugavelukunibeliniwo.pdf
    • https://uploads.strikinglycdn.com/files/5a7f2855-0ef1-465a-9dc7-b54bb3611d92/simon_lord_of_the_flies_character_description.pdf
    • https://uploads.strikinglycdn.com/files/9abc5dfb-fc8a-4967-8886-ead93e9e5afd/99095290660.pdf
    • http://modudupudabu.rf.gd/6925437277.pdf
    • https://uploads.strikinglycdn.com/files/d4a504a1-c05a-43d2-9955-d1810c0f7cf5/bisom.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_off0000f10a.bin
f4edd27ee6f769ca4768769e8239e7487c22a74253e5eeda4aa69342f3b62272		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 4984 bytes
font_01_sfnt_off000101db.bin
7350eb79823230d90f5aa13d4eb1666839a684c67374406ca869569ca1ae0a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 12736 bytes
font_02_sfnt_off00012a10.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A10 4324 bytes

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