Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4fe562b37c1a51…

MALICIOUS

PDF

78.5 KB Created: 2021-07-13 21:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cd1cfd1f9042b659cb4be73b250892e SHA-1: 2b656c9ba9d3bec8d1646387153507a8f919ddba SHA-256: 9e4fe562b37c1a51b1bee4d5fbaa8dce87d189dd9a207fb5db6dc5ad83f33582
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability to execute code. The presence of embedded URLs, though currently classified as benign, suggests an attempt to lure the user to external resources. The document body is heavily obfuscated and unreadable, preventing a more specific analysis of its intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/pL_UGxDroB4/square?utm_term=porter+and+moss+pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e953c2f4fe78435a3c32bc/1625904066300/how_to_combine_files_on_windows_7.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e91464defa333328aa105f/1625887845047/rarakofetomegubavugoxe.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7e516ad76c09748fa971/1626111569448/pre_independence_indian_english_literature.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7f7db6e46386ca3c1c994/1625815003485/african_fire_skink_for_sale.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e87253c0564a3341a621f3/1625846355814/lean_in_imposter_syndrome.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7ac5e64ce5371633e75e/1626110661816/foreshadowing_in_english_literature.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_off0000d04b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD04B 16792 bytes
font_01_sfnt_off0000e862.bin
6ebdb07a3ac3a37d12eee976c058808d8271fd3beddd2a9391c56a177735368d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 10524 bytes
font_02_sfnt_off00010056.bin
5c37288531b876396acda7745b55773d0bd756e1bf86c7012dbcc5dc61a431df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10056 17112 bytes

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