Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e3505870e8c1ca…

MALICIOUS

PDF

79.3 KB Created: 2021-07-13 15:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 764920fea90b0baac6dfdb60b5d8d7c2 SHA-1: 85726e5e9cadff60582654a278502c2fabfaf8f5 SHA-256: b0e3505870e8c1ca6fa35dd3e698914ff1150468d7c7f76d404c813eba945a15
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded URLs. While most extracted URLs are confirmed benign, the presence of a PDF_URI heuristic firing indicates an external URI was present. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or credential harvesting by directing users to external resources. No scripts were extracted, limiting further analysis of specific behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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://feedproxy.google.com/~r/sq/ugae/~3/5JeRQhMeIYg/square?utm_term=how+to+get+permanent+marker+off+metal
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7e39cefb14d112211b06e/1625809820791/suwibomuzafezefogokexamuw.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9453818245d33f182d634/1625900344467/witcher_3_gwent_trophy_guide.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed3797e255175820be9cf8/1626158999521/pdf_to_ppt_linux.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e87b54586b0355f20875f2/1625848660357/37671215063.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_off0000d357.bin
3fd00f8a68c789032786d98d467e657c35bc918cb003ff6dacff9fb2a843cc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD357 10612 bytes
font_01_sfnt_off0000eba2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 16792 bytes
font_02_sfnt_off000103b4.bin
0e55543028ed53f4c76ec0903577f97325f8e6a0367171f19ba105bab24d2055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 17444 bytes

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