Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f5dce25ba50361…

MALICIOUS

PDF

73.3 KB Created: 2021-07-14 00:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 543f1329dd46478621c3d985a956caf9 SHA-1: ddb6449b42882d04d0d5604a12ad261e60bc661e SHA-256: f6f5dce25ba503611f9453b4167ab87873d2583f2f8c3e714ebd53dbcbe5d188
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

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://krisoc.ru/square?utm_term=electric+machinery+by+fitzgerald
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7d198b977dd1475c9b7e4/1625805208974/ketepozegevasifo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec813ec217102653d60272/1626112318407/all_about_capricorn.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e95045085b1c120f99abf5/1625903174022/the_killing_of_a_sacred_deer.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7fe3dd2ac847ff7e420f/1626111971346/100_rmb_to_sgd.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_off0000bb67.bin
68ed4f5921495a3d2137d5d364817b8b3f4d61f0f2a0e69c9548450854096cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB67 10932 bytes
font_01_sfnt_off0000d455.bin
ee94188f63ba3aec155a8377f3a59974c4d96301dc8b3cefa7122ca61380ba65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 17160 bytes
font_02_sfnt_off00010155.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10155 16792 bytes

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