Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b78e9f9162f4b1b…

MALICIOUS

PDF

81.8 KB Created: 2021-07-16 09:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 630ddd92f1569886bc0bd70b2d31ed4c SHA-1: f0f3d9535e350683c2f47f8fc2e6ef473966f570 SHA-256: 3b78e9f9162f4b1bf781c504f3d372b96ea42487f6c7d0b5c8c1e77b62642676
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

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://laborke.ru/square?utm_term=lifeboat+ethics+questions+and+answers
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec804bdd2ac847ff7e53d6/1626112075377/36329853258.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0a4cf443f830b415a28a3/1626383567493/simple_protocol_in_data_link_layer.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e81fb3d93aeb546a174783/1625825203712/53040917898.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_off0000dbdd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 16792 bytes
font_01_sfnt_off0000f3ef.bin
1dce844997428748dbe528420eecc648b2ca9c9364c8026ea267ca50875dad12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 17692 bytes
font_02_sfnt_off0001222c.bin
be4d29a9985f201d7299f21d35fdee410df9951d54ba45cb2d9d839edfc185cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1222C 10956 bytes

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