Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd53c480f47cf46…

MALICIOUS

PDF

77.6 KB Created: 2021-07-16 13:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 810c3a063016aec824df0e5b02b118bb SHA-1: 4220f2928c8dbbd0e1804638831b94e2496c96c5 SHA-256: 5cd53c480f47cf468ddaa384a3d810f3d4f041a927b18f5b921efca07f6d2fbf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains embedded URLs that point to external resources, suggesting it may be used to redirect users to malicious sites or download further payloads. The presence of PDF-specific heuristics and the nature of the embedded URLs point towards a phishing or credential harvesting attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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=matlab+laplace+transform+differential+equations
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e82a22d56f0f3612743dd1/1625827874561/remembering_the_kanji_by_heisig.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed0822f84adf285bedf301/1626146850615/texture_pack_1.8_9_realistic.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eddd820229956bd13429b1/1626201474962/man_search_for_himself.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f10c29e75c7a046d9b4d5a/1626410025773/pstm_certificate_for_sslc.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efe0834980ba6b3b6d64e0/1626333315296/92498043635.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_off0000c809.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 16792 bytes
font_01_sfnt_off0000e020.bin
8feb900fefe1a29b2cae285197aa0cb76e73fa3764e1e8ec75ea012a73a72dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 11160 bytes
font_02_sfnt_off0000f9c2.bin
4a37f1a468d81ad65ca39bf1b7cd4a288d3639ef1033c7550d788dc2232c2ee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 17576 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.