Malicious PDF — malware analysis report

Static analysis result for SHA-256 a910c34fa4136ad0…

MALICIOUS

PDF

84.2 KB Created: 2021-07-21 14:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21ca51499ba8924e5446fa41810bbd45 SHA-1: eaa5bd1cfffaa376283a523c2b7c530384995e56 SHA-256: a910c34fa4136ad083f7afbe1a872d27ffd5982e432b570b24aae80737c4cfed
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that, despite being labeled as benign in the provided context, is part of the malicious functionality. The PDF structure and heuristics suggest an attempt to exploit user interaction via embedded content, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8790

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/W5vEtEh6t-A/square?utm_term=harvest+moon+back+to+nature+gift+guide
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee61e87426fb5109f703f8/1626235368410/53192329892.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0256a5740a719f4adf763/1626350954365/90277899503.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f44a599c57c2493944c868/1626622553948/7093236455.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec9b1fe0784948549aa2c7/1626118943649/mevakavil.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e926995fa2eb14b90bef8c/1625892505385/24025518486.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f397ee6d5e991e36e35eac/1626576879054/is_boiling_egg_a_chemical_change.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f76fd66f1006132f0a88da/1626828758496/3667230636.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_off0000e901.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 16792 bytes
font_01_sfnt_off00010118.bin
150e9c596c17098c611eba8de293a2292e3cd681e7d78070d9de1f0e33d067cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 11164 bytes
font_02_sfnt_off00011af9.bin
3ca2ad0ef1aebf3456adb18fb47d52f08267b1ccadd20912269d12d5fefe7b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 16220 bytes

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