Malicious PDF — malware analysis report

Static analysis result for SHA-256 944b82dae1613e3f…

MALICIOUS

PDF

96.5 KB Created: 2021-07-18 11:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9987a1815fc3f55067017a4856497e4 SHA-1: 72d95ef380708508e9e11aadb78f78436e56b006 SHA-256: 944b82dae1613e3f5183b05fca52aa1193261d88df5fef93101651bddb74f6fd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The presence of embedded URLs, though marked as benign, suggests an attempt to redirect the user. The PDF structure and heuristics indicate it's likely a malicious document, possibly exploiting PDF vulnerabilities or using embedded scripts to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6187

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/gPkW7oTCsL0/square?utm_term=the+jobs+to+be+done+playbook+pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f06c8e62e978296c9cbe53/1626369166292/sustainable_development_project.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edb301c48108232e47038b/1626190593996/capricorn_in_6th_house_health.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92287320dbd0de2810c43/1625891464059/jewuvegudabojosoraw.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117f3.bin
93e6788f6f9769d606b3acbcb987da7e4974ca32398a209baf6e5e3b995318a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F3 10844 bytes
font_01_sfnt_off000130c4.bin
93d7842ffd497adcd65b840c95881bc00a2f45dc7f27c0825d3d48db303a99e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130C4 16980 bytes
font_02_sfnt_off00015cf1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF1 16792 bytes

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