Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a9f09c6daa1c68…

MALICIOUS

PDF

78.2 KB Created: 2021-07-14 00:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b30032ddaa5e76e4d3518607deec25bd SHA-1: bd0ec5591174df8b1174b744062fd4a8610fdb2f SHA-256: e2a9f09c6daa1c6840b71ed4fa12c41954575a11a854fcd4fc8df679f8f3f0e2
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. The embedded URL `https://crewmak.ru/square?utm_term=matlab+exercises+and+solutions+pdf` is suspicious and likely leads to a malicious site. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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://crewmak.ru/square?utm_term=matlab+exercises+and+solutions+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8db4704a383bbeda2ff6/1626115508341/chalicotherium_ark_taming.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd36880caa629c1dae75b/1626198888293/derivative_of_signum_function.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edda94172ba47bdac33ca0/1626200724700/gozolinus.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_off0000ce07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE07 16792 bytes
font_01_sfnt_off0000e61e.bin
ab3b79198434452bd267d15aa215f544802d24cad6c00a47cdc258349fb4d468		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 10948 bytes
font_02_sfnt_off0000ff6f.bin
13e434a3874d3ee1ee86c5acba16150f9a26dc599205880b968c1df4fc5031d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 17300 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.