Malicious PDF — malware analysis report

Static analysis result for SHA-256 a805116d721f54c7…

MALICIOUS

PDF

81.3 KB Created: 2021-07-17 23:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b3b22c993ad74ee30e61ee7a1860bd5 SHA-1: 16ee820c64e8b10f34f9c6e79294e9b718e1b755 SHA-256: a805116d721f54c761bd2652954b5ddb02d1ee030634acfdd0fb778727cb2995
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier. It contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a Squarespace page. While the specific Squarespace URLs appear benign, the overall detection suggests a phishing or scam attempt. No scripts were extracted, limiting the analysis of the exact payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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/razvivatel/yapz/~3/UZrB20b2Dcg/square?utm_term=is+oats+good+for+heart+patients
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee56f6ab0cb8743be63613/1626232566948/convert_scanned_to_editable_text.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee52eeb1dcdf258da92a68/1626231534467/pavifumuwanutiwijax.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee75b48e3fff2bd3c3b434/1626240436723/57276764950.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f13dea7ffd90482e387ab3/1626422762846/migamobivonad.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8114c51cb2a526cfe9f73/1625821516524/35263631219.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f067de93de1c7b8a0a7264/1626367966794/kapenekikusixidawewubu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7caaa7be683581ce1d273/1625803434289/hot_air_oven.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_off0000d982.bin
d7586429d609f21e9d61a334ad2f95e44dd9846b3626e678d28e9753551d3417		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD982 17564 bytes
font_01_sfnt_off00010701.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 16792 bytes
font_02_sfnt_off00011f18.bin
3bd193c364792470297e01932d191b69b454d428a6b0de857910988c12e7bf3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F18 10684 bytes

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