Malicious PDF — malware analysis report

Static analysis result for SHA-256 941dbfe58eaec303…

MALICIOUS

PDF

79.8 KB Created: 2021-07-21 01:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1fd2a17ddb455cec611d3ab639a42fe SHA-1: cf1edbe09dd567f64d8412e55ca5ab68f03390c2 SHA-256: 941dbfe58eaec303e17d3a024b59464c3cb5003abc741a029e6caef46858f1f3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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://queure.ru/square?utm_term=home+again+quotes
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e941762a6f785f58355ec4/1625899382661/cold_and_body_aches.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edce64b0089c62dc3c8112/1626197604445/5862320351.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f519bc1ad9bf1c32c96568/1626675645051/red_sword_2012_streaming.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_off0000d7cc.bin
83fee81ddf557cc6f24af5f96649e26db680d2cb4211c7c6ee93ff6016a5a5ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CC 10544 bytes
font_01_sfnt_off0000ef7f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 16792 bytes
font_02_sfnt_off00010791.bin
3a0c0624f28b8b4258e3a87ff9f79d1b79c679953dc654849406c3291c69eaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10791 17056 bytes

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