Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69792db68299b19…

MALICIOUS

PDF

77.6 KB Created: 2021-07-16 07:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 760c5e8105c5769546362d0647de46c7 SHA-1: 28513df56b722eb5be35e584f45b2021ebaa4726 SHA-256: f69792db68299b193f94bdb2e9eddfb9368ecaa922212b0db1042d3a03476d3d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains an embedded URI pointing to a URL. While the URL itself is marked as benign, the presence of an embedded URI in a PDF, coupled with a high ML classifier score and ClamAV detection as a phishing trojan, strongly suggests a malicious intent. The PDF structure and embedded artifacts do not provide further insight into specific malicious behavior beyond the URI, leading to an unknown family classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9214

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/sq/ugae/~3/y83TWYo-3DA/square?utm_term=chapter+6+test+answers
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eded23895aae42f65bd8ee/1626205475326/football_position_acronyms.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee8ff9eed6cd77ab663589/1626247161245/losuriboxag.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7b8be7be683581ce0d9ff/1625798847018/gangavalli_assembly_constituency.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f09ca41e90cb6e18322fc1/1626381477055/the_great_gatsby_character_analysis_chapter_1.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edd9bc24c32e4364b3bc8a/1626200508418/mononigujowutatutovam.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9b7483836e7a7d62df95/1626119028424/92857675193.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e84d107d7e5c4b5f9bcd81/1625836817029/35160807118.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_off0000cfe7.bin
d5834c73fddae59cf794f5f612580faf3541caf9ad31786fbee6adae2566d47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE7 16620 bytes
font_01_sfnt_off0000fb10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 16792 bytes
font_02_sfnt_off00011327.bin
6559cf422e72fa9402de73a9c536a29df76aded2828b899a5a78f6fb33008f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11327 10376 bytes

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