Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3755ac447d504a…

MALICIOUS

PDF

80.9 KB Created: 2021-03-27 17:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2b5c70c134c0bc2a83ba2989d8d5554a SHA-1: 46ec62be19a6db85b3ebddf018cb49f672a6c4f0 SHA-256: bd3755ac447d504a44a8af0b70cfb46d2734f8d968ad62fe851fdb83e6c41ec6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely used for phishing or to download a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a game mod, aligning with common social engineering tactics.

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://zajinet.ru/wix?keyword=portal+gun+mod+ichun PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460677/normal_5ff4d30375073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482023/normal_602d50714cefc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460983/normal_6017b91d41af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_6056dfa72e0b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366325/normal_6004c2a2674f6.pdfIn PDF document text
    • http://zogufovitem.22web.org/97443276806.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/gciZQhc/tutudufidasakukubogupopil.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/9Kginia/panonudosujalukunelinaji.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/fhdQMgZ/pilelulajot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_603457318bf32.pdfIn PDF document text
    • https://cdn.sqhk.co/volotedi/TgjAtXi/table_top_arcade_legends_ultimate.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/9ggAa0w/100_greatest_classic_rock_songs_of_all_time.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_600dd79490966.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fomabobas.epizy.com/app_game_booster_apk.pdfIn PDF document text
    • http://vudutuvugovi.epizy.com/average_life_of_a_viking_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760e6cf6-bd49-4250-8c50-2d1638e1797f/nogizikowipoxusunum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a68a10a-9382-4664-b333-dc36981814bb/el_libro_de_los_muertos_vivientes_1_pelicula_completa_en_espaol.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 5176 bytes
SHA-256: fa1f144decaf0551c75b41cfa3cd3d03a2bfc4232b65f8ffdb0b4c02dbaf4d9d
font_01_sfnt_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 10724 bytes
SHA-256: c2c0b9c86a6fa9f363ea32a00294299b37863d769bfec6e0004800f23bd69653
font_02_sfnt_off0001205c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205C 16064 bytes
SHA-256: 6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953

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