Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4d1fa9f26c0bb0…

MALICIOUS

PDF

73.5 KB Created: 2021-07-16 00:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e06833b4b03ff00e552243a7745bf26 SHA-1: 06ce21701cec4c6dea57ffa4eddf60f8912af8ce SHA-256: de4d1fa9f26c0bb0aec0486e4140769cbe829d6a0447af5c30a57a0c4d11b633
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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://inwebjor.ru/square?utm_term=what+is+a+irrational+number
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec731def188817f7dfc4ff/1626108702095/dukilokodufagofuxevoke.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee45918685745b7d157972/1626228113155/another_term_for_blowing.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee903fb1dcdf258dac2736/1626247231116/xizobutaxi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a5d14049af061a4a5d90/1626383826178/indirect_financial_compensation.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d612de985067772d4bd/1626111329488/52432280546.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a26e7792d424934d2ad5/1626382958486/importance_of_civil_society_in_democracy.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_off0000bf2d.bin
33843c34aaff01a8dcc0cea66c897aada2a96de94d46433f299b27df244a669e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2D 16436 bytes
font_01_sfnt_off0000ea2e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 16792 bytes
font_02_sfnt_off00010245.bin
1602a223507a5a099ee11f62be2c251bca6849fa789e637086103ebb857ad7c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10245 10608 bytes

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