Malicious PDF — malware analysis report

Static analysis result for SHA-256 a309067b3188a16d…

MALICIOUS

PDF

84.7 KB Created: 2021-07-21 05:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67822c72c17ab32cabd2d8a11665dba8 SHA-1: cf9ee578eae0d60de0d79de2c60708d643344741 SHA-256: a309067b3188a16d1adb0ae38409f2be299957e3dc089b7c87a2ad07d1e26d50
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 PDF contains an embedded URI pointing to a suspicious URL, which is a common tactic for phishing or distributing further malware. Although no scripts were explicitly extracted, the presence of an embedded URI suggests an attempt to redirect the user to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/UQ8tT55rDuk/square?utm_term=how+many+months+is+60+years
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca847e0914637f38e6b1b/1626122311155/nurapezokuj.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee5606b27e5958d590dcdc/1626232326734/3538071502.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f264508c10a93e5043b0af/1626498128316/82203443948.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e936015ebba154a8fcfb80/1625896449979/11574271756.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_off0000ea11.bin
119160b202768eaca5d2c9d547384554e1d47046618632caeec8af6438b594bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 10808 bytes
font_01_sfnt_off000102d7.bin
fcadb91899a7d6d22afa53fdad665cbb3320b3f92365fea3b1acabf5280c2a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D7 16892 bytes
font_02_sfnt_off00012ed3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 16792 bytes

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