Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57de6774ca5701d…

MALICIOUS

PDF

79.5 KB Created: 2021-07-19 03:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c2b1981ba47e75a297b961920cf74dc SHA-1: 994902c248742737ccb9d9b1512605fd21dfc51c SHA-256: a57de6774ca5701deba5474af2b43ff20459fc76d2ac0641b504bfc90b5ee9ad
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded URLs, one of which is flagged as a potential phishing attempt. While the specific URLs extracted point to benign Squarespace pages, the ML classifier and ClamAV detection indicate a malicious nature. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6665

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/WVKuihPcy9U/square?utm_term=the+dare+project+123movies
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f02e85365a201d3c3bb65e/1626353285939/third_largest_country_in_the_world.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0f0f1c699444e2e3f2e67/1626403057093/chicken_nuggets_time_in_air_fryer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec904258d864752e020eee/1626116162158/executor_and_trustee_of_will.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_off0000d0ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EA 16792 bytes
font_01_sfnt_off0000e901.bin
0e6de06cb2a35a831c24fc0169983c4087b40c429a09db672ae49db6b0e1df3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 11132 bytes
font_02_sfnt_off0001031c.bin
e19d0451913c7a678ec3ebb0168f04615088dbf4f1e5eb9d2d6e864826344728		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031C 17408 bytes

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