Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc38413d9d6a3500…

MALICIOUS

PDF

80.5 KB Created: 2021-07-13 16:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3665d1abc0f3d8980cd247185f96e34a SHA-1: 046ce7c3abc078b4b4170ee7e89f557c74ab7f0e SHA-256: bc38413d9d6a35006e3c5069883a5eb9bc835b6af2db1c92d11f91d4e09b6e14
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 an embedded URI that, while flagged as benign by the URL reputation service, is presented in a context that suggests a phishing or social engineering attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific payload or intent beyond the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8571

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/razvivatel/yapz/~3/NsX9ihectO0/square?utm_term=minecraft+armour+stand+arms
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed888dc76d6b0ba00f0ca0/1626179725515/87520471199.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed55ed37bee829a2885c2c/1626166765348/holy_faith_absolute_mathematics_class_8_solutions.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ce9a4072d952528eb426/1625869978180/49345424889.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecaa74243eac6055d2a3dd/1626122868453/jafesupos.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8552700aa07a7895204f/1626113362749/red_cross_lifeguard_certification_test_answers.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca847e0914637f38e6b1b/1626122311155/nurapezokuj.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_off0000d546.bin
266f65d8eba66af2741cb43db479f350c8cb0580d97cf45e72f5645e7b47c2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD546 10684 bytes
font_01_sfnt_off0000edca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCA 16792 bytes
font_02_sfnt_off000105dc.bin
76a9285414f7f8f9a92fb95c763aac9d14d48d14f19fe811fa7dda1e77100c37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 18196 bytes

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