Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4688e13aec068a…

MALICIOUS

PDF

68.3 KB Created: 2021-01-12 02:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5567b0fd496874e540e1481021f82948 SHA-1: e78aba995684f6aada4022cbafe36d7e523ca2f5 SHA-256: 2e4688e13aec068af5742c0d832cbdb4a5b4883b50ac38f84319d493aec89372
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Beauty and the beast fingerstyle' and the wkhtmltopdf application, suggesting a lure to disguise the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=beauty+and+the+beast+fingerstyle PDF link annotation
    • https://cdn.sqhk.co/zatejurix/IV0hdhe/truck_parts_calgary_alberta.pdfIn PDF document text
    • https://site-1178650.mozfiles.com/files/1178650/word_mocha_743.pdfIn PDF document text
    • https://site-1176701.mozfiles.com/files/1176701/tugefujosulatixe.pdfIn PDF document text
    • https://site-1172756.mozfiles.com/files/1172756/xevokagobu.pdfIn PDF document text
    • https://cdn.sqhk.co/biwezabob/fgjiogh/noticias_univision_chicago_redadas.pdfIn PDF document text
    • https://site-1176840.mozfiles.com/files/1176840/milumofinopali.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/gjgi6Cr/off_road_ride_quotes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/52004889232.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/the_alchemist_book_with_page_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/antioxidantes_scielo.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/nebegozi.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/vpn_gate_client_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB907 5484 bytes
SHA-256: 70bf16464a280b4363e76a149ca3b500cafc9968276cc4e66203be620d3b5b1b
font_01_sfnt_off0000cbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF7 5460 bytes
SHA-256: c758f4b42ded76639df63e685365909d09dffa23dccc0b5c14ccd34be8113da6
font_02_sfnt_off0000de8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8C 10556 bytes
SHA-256: f9f1846b303c1aedf9c13fac482b79ff046bb3d8b38d77a487a269f889d5d996