Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4ac9c52062b277…

MALICIOUS

PDF

75.1 KB Created: 2021-01-12 12:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6c7ef6c1e99f283e0a07827207263844 SHA-1: da011f80a54fb4ccf62e59183cd4760f919deee9 SHA-256: fa4ac9c52062b2772e102f1ed817d8c817603a8867e09de03f8980a0fca0a640
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The heuristic 'SE_URGENCY_LURE' suggests the document content attempts to create a false sense of urgency to prompt user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=albany+county+clerk+pistol+permit PDF link annotation
    • https://site-1176489.mozfiles.com/files/1176489/19790807592.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/j7ehbih/true_s_world_super_jungle_adventure_new_york.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481662/normal_5fce97fad3202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5fb5c5680c30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fa448c96639e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365626/normal_5ffbe0eed9fed.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/4ibwZi4/19728353269.pdfIn PDF document text
    • https://cdn.sqhk.co/rapavuse/OhbhhNi/football_manager_2019_squad_update_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zitajazasu/jiRnpGU/board_games_pros_and_cons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491933/normal_5ff3c51bb7541.pdfIn PDF document text
    • https://site-1178201.mozfiles.com/files/1178201/fufebupewufifirek.pdfIn PDF document text
    • https://site-1172834.mozfiles.com/files/1172834/inside_out_2011_movie.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/sakaburepagase/platformio_arduino_upload.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_off0000e8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CB 5376 bytes
SHA-256: 1a723619950c234e981befb522e827532e5a4b461c467dce8d0b22640e517ffd
font_01_sfnt_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 10772 bytes
SHA-256: 62d34255b06217a32e3fd9c7163662031ef286b99dbe9f2cea645cac8471ee6a

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