Malicious PDF — malware analysis report

Static analysis result for SHA-256 21184c2a02df5e00…

MALICIOUS

PDF

61.5 KB Created: 2020-11-26 05:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 612deca054dc2b50480195f75ba07554 SHA-1: bed26d613ad54288392fea6f5980f6e4df55de60 SHA-256: 21184c2a02df5e007d3482b56e3e49198cd32ebccd028e8d05157b65ae5f4b22
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is highly suspicious. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI strongly suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=matsuya+japanese+restaurant+florence+ky PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477886/normal_5fbedab9572b1.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/jovekus/alimentacion_consciente_suzanne_powell_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/sopanapevisawarol.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/citrus_juicer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/vafoliwidenopara.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/platinum_mathematics_grade_7_teacher_s_guide_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e6847d-95c4-4f30-93c8-2f5ed284eb51/fumemoje.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/tivixapotirozeved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b66d5c-2fd0-4434-a029-6908651dae95/39344600617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d823f58d-d21e-4491-8243-2e95e3606e9c/1672819873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e6c444-a061-4f1d-a9c1-1fbc267cd5d0/lodizafoweje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7a6809-394b-4d8c-8abf-474c1e5afa70/sorilubuvoferek.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_off0000b4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EE 5256 bytes
SHA-256: ad814ee24ce0a4f000b457610d869f41fbf5910d81d2a1201fa857215e1951f6
font_01_sfnt_off0000c6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FC 10208 bytes
SHA-256: b71231754c188a1ecb594a318c6ff7ff837d0a1a83a999cdc2ff748436a0664f

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