Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc06b4baa225bdb1…

MALICIOUS

PDF

79.9 KB Created: 2021-07-12 21:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 31ceae0b32428bad0298b7211e526ab0 SHA-1: 7923958842c0102ea5be41418410edc9958c937f SHA-256: dc06b4baa225bdb1f4a8605dee14d0a4ae1966b2e37f57f0402d6913af884f1a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, one of which is flagged as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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://feedproxy.google.com/~r/sq/ugae/~3/UQ8tT55rDuk/square?utm_term=rise+of+the+tomb+raider+trophies
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7f16dce8457037ee37924/1625813357147/which_order_to_watch_marvel_series.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e94510085b1c120f994b26/1625900304531/movuxapilemod.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec787bc268f363b085a3bc/1626110075308/nofigokeba.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e85dc55a77f7003fb64d66/1625841093848/zafopak.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8c67d9ffc3426e8a496a9/1625867901672/43154894775.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7810fd54eb0708249fcd/1626109968798/corkys_bbq_ribs_cooking_instructions.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7fbafa40056e74d1d542/1626111931060/39649975884.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec82a6b6dedd3ae1689ff2/1626112678764/jobs_i_can_do_alone.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_off0000d692.bin
b0b90d3f7396fdf2884536e93e30f4d52c44b118f48247481b0b6bd60139655c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD692 10800 bytes
font_01_sfnt_off0000ef3d.bin
5974ead7d8c3a9a29838687495d3eea98b17336c3023abd1046cd4135541cd90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 17004 bytes
font_02_sfnt_off00011ba6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA6 16792 bytes

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