Malicious PDF — malware analysis report

Static analysis result for SHA-256 101c904e21a53ccd…

MALICIOUS

PDF

78.0 KB Created: 2020-12-29 23:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: adc0e4577bd6c62a4598b7b8b05fb282 SHA-1: b6a8da6b5a323edd2542efa3a92d93c8d5e28c1d SHA-256: 101c904e21a53ccd673ce30746a5257e15bdca30b14e68d0482e2af97dbdc70b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'trafffe.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate a malicious intent to redirect the user to a potentially harmful site.

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/strik?utm_term=ships+at+battleship+cove+fall+river+ma PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8a079cb2c2d.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/rjblPic/best_voice_recorder_app_for_iphone_xr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f9bda997cce8.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/tuzakifezara/79953516670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ee3950-e976-4345-9ccf-be9fe2125c49/augustus_of_primaporta_material.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/gosudalusiwuwow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c83bf1-c647-40fc-9576-43a85ea25e77/crucial_accountability_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b659c4f8-68ef-4c3d-adeb-8a15768cae66/fotizuwasesetewe.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/80738558374.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/yeh_hai_mohabbatein_full_episode_on_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4abf87d7-dcb6-4859-a784-795a12cdc79a/68589565824.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_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 5556 bytes
SHA-256: 88dab2a13e0d29e20bdc45578be125c69eae0d728940e5dd0d3ac4a181675b07
font_01_sfnt_off000104ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AE 11388 bytes
SHA-256: 17b207551e4ec2b9119634f68b0f10c0db6638bc5dde52b188120b50a85d78bd