Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9cb876caefdb49…

MALICIOUS

PDF

76.8 KB Created: 2021-07-20 20:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e37c1115ee8a4818ddd51cefca7e0dd6 SHA-1: 25cc6625219953bf3657c5f9e21416d87087de21 SHA-256: fe9cb876caefdb49d36508eb043a6d4f269212058309ec63b5336b05e5ff4777
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing attempt or dropper. Although the document body is heavily obfuscated and contains no readable text, the presence of embedded URLs and the overall detection by security tools suggest malicious intent. The file likely exploits PDF vulnerabilities or uses obfuscated scripts to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/cEZ-xJcQpFE/square?utm_term=virginia+woolf+a+sketch+of+the+past
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8882b30bd7c5a01d48642/1625851947295/meaning_of_statistics_in_english.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f6699649ed543a17db6324/1626761622995/33490465688.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1c79e6e793e256b4c42da/1626458014469/odin_other_names.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f23be0ac778402356014e4/1626487776355/haunting_of_hill_house_1.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7ff3638ed220952af0fc3/1625816886650/lokukibibezuvapogerep.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_off0000cb81.bin
bf8aef50e1de39608878c5f252e15802f6bde04638e38382a332b2aeb7aa7ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB81 16456 bytes
font_01_sfnt_off0000f5f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F8 16792 bytes
font_02_sfnt_off00010e0f.bin
9127d41fceb0a1e2929a5875a1554717e4b333f540c65d6efda4013585751b05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0F 10904 bytes

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