Malicious PDF — malware analysis report

Static analysis result for SHA-256 9046932ff46f74c1…

MALICIOUS

PDF

74.8 KB Created: 2021-07-15 21:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b96f22c15381788d4d74693c4f3e369 SHA-1: 658563cb1f4d88285026be2fda1972875d8f0052 SHA-256: 9046932ff46f74c10b386770261e8c9989b22b19100af310015f07894a04825e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains embedded URLs, one of which is flagged as a potential phishing lure. Although no scripts were explicitly extracted, the presence of PDF-specific heuristics and the overall detection suggest it's designed to exploit users by directing them to malicious content. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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/-MXWpcYQ7kA/square?utm_term=three+founding+fathers+of+sociology
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e81b6f9ebc0053f3190f1d/1625824111245/blow_down_operation_is.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7729baeb71755aa781068/1625780892133/holo_the_wise_wolf.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec87c9f89f8e700bf7dd1a/1626113993625/luteinizing_hormone_high_in_females.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f03645365a201d3c3c300f/1626355269554/vfr_vs_ifr_conditions.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_off0000c41d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC41D 16792 bytes
font_01_sfnt_off0000dc34.bin
b77a997ba850d15dcfe3161b02555b7f7044403b99ab77aa9addf9eea24a1bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 10932 bytes
font_02_sfnt_off0000f54c.bin
c050a53c9d4f79ab04d539d24cc1e61a17884ac12d08ef51fd91ead0893889c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54C 16256 bytes

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