Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c0a7a94069672f…

MALICIOUS

PDF

69.6 KB Created: 2020-11-24 05:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9e0aa18afe511954975a6946987c8f SHA-1: 02935d6d0c00405e1227425275471dc7541dc40d SHA-256: a3c0a7a94069672f162c57968ab56ae616266ea1253afcf3e812588a4de3ead8
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a download button lure and an embedded URI pointing to a URL associated with cracked software strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded URI are indicative of exploitation for client execution, likely leading to further payload delivery.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=wondershare+video+editor+crack
    • https://cdn-cms.f-static.net/uploads/4403820/normal_5faa7cef1090e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b10d40ed-6b1d-4e8b-a5d3-7401b1bbf9b6/litenudekufedogefen.pdf
    • https://uploads.strikinglycdn.com/files/c4ea2bb0-7bd8-40b0-bd89-1ea37d79e51b/2006_pt_cruiser_owners_manual.pdf
    • https://s3.amazonaws.com/bejexe/bodabuguri.pdf
    • https://s3.amazonaws.com/viromibukoleliw/sengoku_basara_pc_free.pdf
    • https://uploads.strikinglycdn.com/files/36c80445-3a5d-46f0-80a8-b5167164c006/37388847741.pdf
    • https://uploads.strikinglycdn.com/files/c88f19ba-e99e-4fc7-abf2-f06ab0dce213/7114441984.pdf
    • https://uploads.strikinglycdn.com/files/ed46be8d-a7b7-4dc6-bcc8-fc19933f192c/57414145140.pdf
    • https://uploads.strikinglycdn.com/files/9cd7d64f-f0e9-459b-8891-057560c5f709/64220464653.pdf
    • https://uploads.strikinglycdn.com/files/f54a785b-63ae-4411-9a76-d8914cfca465/66653735364.pdf
    • https://uploads.strikinglycdn.com/files/37ae4538-5dc0-4aba-8a36-fdc65f209d7e/raxuf.pdf
    • https://uploads.strikinglycdn.com/files/826f09d4-20dd-4f16-968b-c1d031aca0d1/cohesive_devices_exercises_with_answers.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_off0000d2f5.bin
f9a7aade8017171b58b748d43becbdcd237e41a3b6c41cea0fd41eb1b6bb3310
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 5132 bytes
font_01_sfnt_off0000e476.bin
52a8451f5615a715fedf60aa090c17a7095d4615af78bfae39964df685e9d216
pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 10844 bytes