Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a55f2ee758af51…

MALICIOUS

PDF

100.3 KB Created: 2021-07-18 18:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e9d00b5fbca24165614135c7f977dd5 SHA-1: 079189b7f6aba6c5b6c9a973129ffbb4c597e3ef SHA-256: 00a55f2ee758af514d2f2895dda9c43f6621d0e7682157eebda1665815b14f85
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains an embedded URI pointing to an external resource. ClamAV identified this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. While the document body is heavily obfuscated and unreadable, the presence of the embedded URI and the ClamAV signature strongly suggest a phishing or malware distribution attempt. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3167

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/~3/1LSSs5qy-i4/square?utm_term=cinderella+and+little+red+riding+hood
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f14cba311eab0d81ad7ab4/1626426555073/quantile_of_normal_distribution.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e91d4d2210ba6bce12049c/1625890125700/tavern_101_grill__tap_house.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e906cf83ae0c490237fc8c/1625884367140/pazimojapurasogebexi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010515.bin
82ecc07bf6fd248bfea2235582fb606482509bf1f1055d7171d7460b7aa0f96f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10515 21480 bytes
font_01_sfnt_off0001298d.bin
5f22a1549f4bd468bf6e9425c7bb4f3c93dd11472c16e91c506cbf6a2e7cc675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1298D 17428 bytes
font_02_sfnt_off000156bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156BF 16792 bytes
font_03_sfnt_off00016ed6.bin
3cae07b87c42ba35b805811d57e8162e2bfaca76e8b3436260a3bff15de85d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16ED6 10392 bytes

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