Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb254b6f6e281ea…

MALICIOUS

PDF

80.0 KB Created: 2020-12-28 15:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 11494de74d5993a098ca870083f094e5 SHA-1: 4c127114a8338244e5c91ecda249905c96629a3f SHA-256: dcb254b6f6e281ea588835544de5b2e5d66efc892ba44184620ac59ce39418e8
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be related to software downloads, suggesting a phishing or social engineering lure.

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=game+character+maker+software+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482009/normal_5fe56dc154ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463009/normal_5fbc98dfd987a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_5fa671e16836c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404727/normal_5fbdca1912ce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_5fa842ce2ba60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5f9a46941c411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_5fd3386c9e249.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/rawesaragegugar/ielts_writing_task_2_band_7.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/braun_kmm_30_coffee_grinder_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/track_saw_guide_rail_clamps.pdfIn PDF document text
    • https://www.cancer.gov/coronavirusIn 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_off0000fce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE6 5448 bytes
SHA-256: d44046e84a47bb4c6b89c45e5516fe6fa1a68522f722d96266382a90024b801f
font_01_sfnt_off00010f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5A 10592 bytes
SHA-256: 4af6ad20829e1b94dddf1c136bed417006b40120ff66b5cd4573b11ecd720f66

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