Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53f4581621c54cd…

MALICIOUS

PDF

73.6 KB Created: 2021-07-15 15:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b72c98318690df1a59d7d7f6e791502 SHA-1: 73b04d20466bf45b167dbb78c1a98bf66f109827 SHA-256: f53f4581621c54cdb8f2ecd44ee9544cd36c45bcdd9192c461d9ff149a3ea177
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of an external URI suggests an attempt to lead the user to a phishing or malware distribution page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7218

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://pistant.ru/square?utm_term=to+opt+for+meaning
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9325d566ded7d61ad506c/1625895517553/purereralaki.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8863c217102653d6b161/1626114148050/2366566235.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eda8935dd1eb1c2907c0d0/1626187923707/tawosamomikisole.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee1077e03b615e098aa90c/1626214519407/luwefatilu.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_off0000bd12.bin
8da174325a27ed4870afa48a84001aec3742f3159f1d788bb9321d0d38862f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD12 17376 bytes
font_01_sfnt_off0000eb03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 16792 bytes
font_02_sfnt_off0001031a.bin
01a957efaa10d628d412f1742e18bd00be0d7bb5962e9cdad4aaa26c27019973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10452 bytes

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