Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dea9d209fbb5bf2…

MALICIOUS

PDF

73.9 KB Created: 2020-11-24 10:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b10563da83f48846a58593494debe6 SHA-1: ddbd96ce010a33accfea146b6609ed42f0092006 SHA-256: 5dea9d209fbb5bf2107c93d7c00b815f2267cd60e5df0dba381aa89311e0fdd2
154 Risk Score

Malware Insights

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

The PDF contains a link that directs users to a malicious redirector, likely to facilitate the download of malware. The embedded URL and the ML classifier strongly indicate malicious intent, specifically a phishing lure for software downloads. No scripts were extracted, but the PDF structure and embedded URL are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=autocad+2012+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/latufenaw/google_drive_grave_encounters_2.pdf
    • https://s3.amazonaws.com/topipovikapari/autocab_manual.pdf
    • https://s3.amazonaws.com/fasanag/vowoxaba.pdf
    • https://s3.amazonaws.com/fefurorobumi/wedding_cake_stand_ideas.pdf
    • https://s3.amazonaws.com/jidosatikim/fofadijome.pdf
    • https://s3.amazonaws.com/zamuriza/nalopijuxo.pdf
    • https://s3.amazonaws.com/juvetaso/calhoun_county_alabama_accident_reports.pdf
    • https://s3.amazonaws.com/susopuzupure/tubizipama.pdf
    • https://s3.amazonaws.com/tetazino/navafemejapufolinile.pdf
    • https://s3.amazonaws.com/dusined/simms_guide_jacket_4xl.pdf
    • https://s3.amazonaws.com/wozowuledij/gefusegibematufubulaju.pdf
    • https://s3.amazonaws.com/fatisake/52692199828.pdf
    • https://s3.amazonaws.com/xoferuzu/95390585312.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_off0000e3b0.bin
f0a374ac4818e53182fb381e6aebdb48c2a7a67a9c108216450c36fa513ef45f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 5244 bytes
font_01_sfnt_off0000f5b1.bin
03c3c70f628b518676d91de9b60d24fcf85de0218e9c2f8ff72e6af3f11cc574		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 11036 bytes

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