Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7a1ae5ac34169e…

MALICIOUS

PDF

81.1 KB Created: 2021-07-19 16:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d549f45ef87b94bc16da36ce53b73494 SHA-1: 338b02f11e4d45b89a05a647b36fa7d946cf1fed SHA-256: fc7a1ae5ac34169e18893b2a73ab0736f17a664a8096509ad6b8c66409ab6c84
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 high likelihood of malicious intent. The presence of an embedded URI, although flagged as benign, suggests an attempt to redirect the user. The PDF structure and metadata are consistent with malicious document delivery, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/NsX9ihectO0/square?utm_term=dwell+on+your+regrets
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e947f7cc7c08645927fe22/1625901047440/gafevakibufu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1d8f3bc290c37a2efdfdb/1626462452230/99143275071.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede67b6d720f75fb61714b/1626203771312/if_i_let_you_go_by_westlife_mp3_download.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f02d7c1c2a3138379080d7/1626353021138/substituting_stevia_for_sugar_in_baking.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f516dbb84a576e6c14a01c/1626674907762/fubotumezasitizosep.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee798f2485902f3e76eabd/1626241423706/earache_and_scratchy_throat.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8b5d01b38cc0852607a3f/1625863632989/soothing_rain_sounds.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f43daa9471b562af199a60/1626619306115/secondary_math_2_module_2_structures_of_expressions_2.10_answers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eda00bcd0cb17c762f0c1a/1626185739591/relationship_goals_mike_todd_free.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0b7b20a71fd0da9a6e7ca/1626388402841/customer_perceived_value.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f50f53a3156f43f347169b/1626672979311/capital_letters_in_small_size.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_off0000d934.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 16792 bytes
font_01_sfnt_off0000f146.bin
648433a79f38a9e9f39cca93e961c354660bfb22d24820d57e0123fc6de9cea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 17704 bytes
font_02_sfnt_off00011f60.bin
5f8047d2e52c238aa3b94b99d3e6e3dc81578758e7af7df8b67ce7f70ee7d899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F60 10332 bytes

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