Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62c1528f7ea8520…

MALICIOUS

PDF

73.2 KB Created: 2021-07-12 21:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 531b640d35f8f5f4cf05e9608e082915 SHA-1: 7a80c109d572f257345f7cb721bd39eabb65b695 SHA-256: e62c1528f7ea85209d400ed21fdf5ccae97882ad0eb3dcbace7e2025529eda66
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that points to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

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://pistant.ru/square?utm_term=all+the+best+for+your+future+endeavors+quotes
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e84fb253d6ed6d7600d038/1625837490277/wilubexidukiwopumaxut.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90eab27127e68041538d8/1625886379846/not_returning_to_work_after_fmla_letter.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e787f2dd9f097edeccb5bf/1625786354288/zukanivopilagesuxus.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e77119ed752f59ce2ae92b/1625780505745/remnant_from_the_ashes_gry_online.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_off0000bfd0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD0 16792 bytes
font_01_sfnt_off0000d7e7.bin
c0014ace1718adae23d5b33b788d54a6968a7a5339c21fcb3f393c8aa21422b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E7 10904 bytes
font_02_sfnt_off0000f0fc.bin
d6cd4f5f277eaa8fd82c536f3157180cf8788f13fb117e8c9b2fff924c77227b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 15448 bytes

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