Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd3cae0e908c6bd…

MALICIOUS

PDF

60.4 KB Created: 2020-11-13 14:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e42f2100f586bd3b846342288021aedc SHA-1: c34c909a1d8173a95b790ca54ca0ad8672bf417b SHA-256: 9bd3cae0e908c6bdb9ac99dfa20872433fa2e85ce21a4fdb7c8b22ac84b317f2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or social engineering attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

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://trafffe.ru/strik?utm_term=dying+light+save+file+location PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444655/normal_5fad464b43040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_5f99f05b71e06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5f9bb3cdda213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f9b459aed850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5f8f6254c8386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f9f9e1724400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_5f9be47ec4ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8fe0098ffdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_5fad4ca41468d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3f7507-6f46-454e-a3bd-f8966922e662/2000_mercedes_c230_kompressor_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7f3f19-1805-47ed-ad32-9c3fecdee490/proceso_administrativo_ensayo.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/fun_home_a_family_tragicomic_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6c7a23-0537-489c-b68b-f2058457244d/pijide.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/5974068207.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_off0000ad6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6F 5208 bytes
SHA-256: d008bbb288f2449059f7d97a391bde1b895b4de5d124ff4dad96b0da4b489fc5
font_01_sfnt_off0000bf46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF46 11116 bytes
SHA-256: 157a723a41688757162d66ca37f3045df77de3948d664088060cb38c154e09e2

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