Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5601847c6ef95e6…

MALICIOUS

PDF

75.7 KB Created: 2021-07-19 10:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cff6aa9f0fc62b76c27dc7c3225cc46 SHA-1: 534023316f3f8b49da3e93a4011ba66db58a3a5f SHA-256: d5601847c6ef95e687cf384bbc6b0b59bc39fc916d7ce9092ff5b9b934490e0f
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to external resources. The file's structure and detection patterns align with known malicious PDF exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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/UQ8tT55rDuk/square?utm_term=how+many+tablespoons+in+8+cups
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0c9cf9014c44c528a86d2/1626393039985/can_a_person_see_when_you_screenshot_instagram.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f21f9a503a21671784f7c7/1626480539133/what_is_the_symbol_of_ares.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f527356d5e991e36f60a5e/1626679095554/stereotactic_vacuum_assisted_breast_biopsy.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0fc8c9b6f23611954ba02/1626406029103/xat_2016_question_paper_with_solution.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_off0000c5d7.bin
67b23bc780cca5a5e0a484e7e97ba16ca514b740af6e03205c6def710dfeaf00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D7 16624 bytes
font_01_sfnt_off0000f13f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 16792 bytes
font_02_sfnt_off00010956.bin
e82fcd5a019eeb678b747971cad01729d9387944ed10c96dd0f9ff594e3ad7c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10956 11072 bytes

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