Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5cfb1d2b0caced…

MALICIOUS

PDF

75.8 KB Created: 2021-03-26 10:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f966e02484b8c8b63c5a5845307f5e04 SHA-1: 7d994b53da5366fcc0774b2e360d13455b2e3b55 SHA-256: 5d5cfb1d2b0caced73b1ac78b550dcb0f7f9d1042cfadad3cd38328bcb4f6bf3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified as a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crophysi.ru/strik?utm_term=take+five+dave+brubeck+sheet+music+alto+sax
    • https://static.s123-cdn-static.com/uploads/4417526/normal_5fe44c8b55af1.pdf
    • https://cdn-cms.f-static.net/uploads/4496360/normal_60483dd32cce7.pdf
    • https://cdn-cms.f-static.net/uploads/4465392/normal_5fd65b52ccae7.pdf
    • https://cdn-cms.f-static.net/uploads/4484633/normal_6057da48e5a3f.pdf
    • http://xogavuw.medianewsonline.com/bact_alert_3d_60.pdf
    • https://cdn-cms.f-static.net/uploads/4505159/normal_604a1700737a7.pdf
    • https://cdn-cms.f-static.net/uploads/4415544/normal_600ab0cbe5bca.pdf
    • https://static.s123-cdn-static.com/uploads/4366984/normal_5fc9daf2c8be3.pdf
    • http://pinezotamex.getenjoyment.net/57350063142.pdf
    • https://cdn-cms.f-static.net/uploads/4384639/normal_601dbf619282f.pdf
    • https://cdn-cms.f-static.net/uploads/4501380/normal_60597c0da1304.pdf
    • http://sevowina.medianewsonline.com/ttulos_de_crdito_imobilirio_direito_empresarial.pdf
    • https://cdn-cms.f-static.net/uploads/4385214/normal_6038751fc3a02.pdf
    • https://cdn.sqhk.co/xatuxazaz/shhrVhb/zexukuvibuj.pdf
    • https://cdn-cms.f-static.net/uploads/4463308/normal_604966c9100de.pdf
    • https://cdn.sqhk.co/zogowefu/jjYzB5S/39089730730.pdf
    • https://cdn.sqhk.co/zadirajuviku/yggaxjj/41373506491.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_602f600a17cc7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mubefula/dance_mat_typing_guide_level_2.pdf
    • https://s3.amazonaws.com/fajonubinomeder/fefozodulu.pdf
    • https://s3.amazonaws.com/besafefaf/rawitilofupe.pdf
    • http://bexukavibume.myartsonline.com/48278403834.pdf
    • https://s3.amazonaws.com/sepawi/lotajazewozosatimirufu.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_off0000e622.bin
bd1715b1c58947ea6f92a1c8c153f608f01d2fe156e0fff19c38e898ebfaff8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 5540 bytes
font_01_sfnt_off0000f8e3.bin
4c4abf6eafaa237fd521ecd7381f17a655ffbfa8607c87631e8aa118133ec197
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 12272 bytes