Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5acbb8e8b45cf11…

MALICIOUS

PDF

67.8 KB Created: 2020-12-27 10:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0caf159f11242c94a0246a7e5b9bc5c7 SHA-1: 7101027ee94a5da56270f399485c30b8072b0717 SHA-256: a5acbb8e8b45cf1167c8c1d7984c9b27500e1add2f04ea626bb1c428bc13b8ab
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'trafffi.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and the presence of external links are common in phishing lures.

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://trafffi.ru/strik?utm_term=super+contraption+3d+pc
    • https://cdn.sqhk.co/veleviziwew/Ggiib0H/63990049738.pdf
    • https://cdn.sqhk.co/fetadupozo/k3PKLhi/rimote.pdf
    • https://cdn.sqhk.co/zegetaru/fCiehji/mortal_kombat_scorpion_wallpaper_mobile.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizomoravazub/definition_of_operations_management.pdf
    • https://uploads.strikinglycdn.com/files/87e5ebd0-ac72-42df-91e8-3f81a83e3e2a/jurgen_habermas_public_sphere.pdf
    • https://s3.amazonaws.com/debamijizozexo/81251162023.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/wilituvupebulexil.pdf
    • https://s3.amazonaws.com/wizuluworafid/gibizuketusedetu.pdf
    • https://uploads.strikinglycdn.com/files/d480e77f-d2ad-41ef-8b34-13293cd82959/edz_the_drain_destiny_2.pdf
    • https://uploads.strikinglycdn.com/files/cf290bf3-0e2d-4a0d-aec9-048ef1d59364/18095012876.pdf
    • https://s3.amazonaws.com/baposivarabuj/39319789962.pdf
    • https://s3.amazonaws.com/wovitiku/white_apes_full_movie.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdce.bin
b3c1b08a6c2dd872c46de1f1464e3a7978ccbd00488d859bb3acb0fd09545c40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCE 5124 bytes
font_01_sfnt_off0000df4b.bin
b2e3d8746b811cff2fa2c6c3271180429b2d2004d3e26337ea375241e2ab3a23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 10388 bytes

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