Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f53d59a624f997c…

MALICIOUS

PDF

81.9 KB Created: 2021-07-13 06:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e27970102994f12b43eb288b9173c6e SHA-1: 0f913c3b271848f6587fe1b8f3259f6cee17eb14 SHA-256: 8f53d59a624f997c0ca6fa4cd3d860c2500143c65131e9ed93c0b40e4ca5d8b6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The PDF structure and embedded content suggest it's intended to lure the user to a phishing site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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://wastran.ru/square?utm_term=god+of+martial+arts+chapter+122.2
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec77f5c8b0d544b6d6765e/1626109941558/appreciation_letter_to_parents_from_school.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecdbdb0318596fdcbb9cca/1626135515525/79817834467.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec73355f604029b98fd972/1626108725946/50563607311.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e3c8c14ff043cd597d01/1625875400252/how_to_save_a_webpage_as_in_mobile.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec9dca478ebe26bfc7d0c2/1626119626358/for_i_know_my_god_can_move_mountain_lyrics.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_off0000df67.bin
93643cf0a350071f192d933581aaa4900dae5c21b71023943dab8d76efabdfa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF67 16316 bytes
font_01_sfnt_off000109df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 16792 bytes
font_02_sfnt_off000121f6.bin
f8cc3d0e2745208e3814b6ce85007df3721ed45a6ec2cbc442d0aa1cd38027d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121F6 11060 bytes

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