Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe395c6cd8da5b7f…

MALICIOUS

PDF

80.2 KB Created: 2021-07-15 16:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e3716506ebd161d505ed1ca44ac11d1 SHA-1: 73fdba871e298b2b4537c96f0449edfa6fb99919 SHA-256: fe395c6cd8da5b7f321122d40344767d087d6c7c055ece53bd2d8165ead6a62f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. The presence of embedded URLs suggests a phishing or malware distribution attempt, aligning with the Spearphishing Attachment technique. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/r_nBws6J8g8/square?utm_term=clothes+for+gacha
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e901c6defa333328a938ee/1625883078745/13561154543.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efef1afdf156014349bb26/1626337051024/miteg.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee7b8433d4654651c0e227/1626241925118/29142112144.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8e1d0e7a3c5fba3e45d5/1626115614072/89599057446.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda212a5c02c6ff4dac5ee/1626186258557/38230952212.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9250e2210ba6bce124cbf/1625892111131/format_of_rti_application.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec85ceff9c8b53cea2b0d0/1626113486608/cubs_chicago_cubs.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8aaeb8cbe518df589a55/1626114734362/pre_sales_solution_architect_interview_questions.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8d0c1951226b8b8b48cd/1626115340871/wexunipezavawused.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed95e47c55557fb27c8f48/1626183140141/one_thousand_seven_hundred_fifty.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee8f938e3fff2bd3c4a841/1626247059833/the_vision_david_wilkerson_download.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_off0000da6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6E 16792 bytes
font_01_sfnt_off0000f280.bin
84435181ff07b6df9aa0da296e7c29df19d5699869033fdd8aa47966fea9f09e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 16392 bytes
font_02_sfnt_off00011d13.bin
3b7f49edb2a9bbb847384cbc280f38521c7a1e1363e5f65f5ba257cb6b680eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D13 10452 bytes

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