Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5d4db2b590a44e…

MALICIOUS

PDF

75.0 KB Created: 2021-07-13 19:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23bc01307f81c42bdf1f606d1dded5d6 SHA-1: 64f31b34d3aca20aca77ff30d1ddf00b467102d9 SHA-256: 0d5d4db2b590a44eef51332fb2059fc2527c279b33787e2ce4354a3de64ba536
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The PDF structure and embedded content suggest it is designed to trick users into visiting a potentially harmful external resource. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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://crewmak.ru/square?utm_term=may+every+wish+of+yours+come+true
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8fc6adb8bb141bad7ee21/1625881706443/fire_gutted_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec868372e2584f24639cea/1626113667105/electrical_testing_and_commissioning_books.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8fed9c874e714248a665/1626116077299/weary_with_being_tossed_about.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_off0000c2c5.bin
fa6c8292c2caed94c94dd0ec4530de54ba7213c811d6ab8cc48df9eaf3dc73e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C5 10812 bytes
font_01_sfnt_off0000dbdc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 16792 bytes
font_02_sfnt_off0000f3ee.bin
00fc9f2dae49ee62c591dff0f7d920fee0e40a846497b61f3105c22763d23273		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 16980 bytes

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