Malicious PDF — malware analysis report

Static analysis result for SHA-256 914858f463d47b69…

MALICIOUS

PDF

74.8 KB Created: 2021-07-14 00:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0dbac77d47314d232ce367c40d61f601 SHA-1: 7324ea0262923f2bfdac6a59c10653ce573d8084 SHA-256: 914858f463d47b69b465e2cb3efbcb5a72591b0eb3ffadb90add8738d814f3fd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing. The PDF structure itself does not contain executable scripts, but the presence of the external URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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=printable+plant+cell+diagram
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ede23fd6ef6771c1dc5d6d/1626202687692/supuxipugazotew.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8e35db9b95949b65b6c40/1625875293771/programming_with_java.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee006b1f6a9512287382b6/1626210411438/6877544880.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_off0000c4f8.bin
fc35b3fe72e1af149320574582ca57ce66b76d9e3c3a6bca783aa6f7392c5fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F8 10712 bytes
font_01_sfnt_off0000dd0b.bin
15d19c333440d4b0c54d384326c14de4758e23ae044bbfa46ad7a00073ed27b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0B 16468 bytes
font_02_sfnt_off000107cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 16792 bytes

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