Malicious PDF — malware analysis report

Static analysis result for SHA-256 e629585fd36d32aa…

MALICIOUS

PDF

77.3 KB Created: 2021-07-14 01:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7d7c74280f07ec4a8ad5a61f84969fb SHA-1: 74a8ea51e5395cfe8b96e2919649a26333551908 SHA-256: e629585fd36d32aa1dfe1fa63fa467e446dcbba5e006da286347111a8cb1fbc7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to direct the user to external resources. The PDF structure and embedded artifacts are consistent with malware delivery mechanisms, potentially involving JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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/HbdJGeoIq_s/square?utm_term=online+create+pdf+from+images
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee01ee1c6c1a61d528dad8/1626210798791/chrome_os_download_for_pc.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb422a73a263c31e29787/1626190882415/2133588513.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e884919af3861f94353fa5/1625851026086/zolisomivizur.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e929fc37cb904475604a87/1625893372695/coping_strategy_scale.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_off0000ce03.bin
60c2ef96cbca4f16d6d3b623ca04ff55482ba6d4934d8f600ab20e7b4316335b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE03 10988 bytes
font_01_sfnt_off0000e753.bin
4abf359297c70c4a234a60d3cbb18177dead66db6e599dcabfbd445a14997721		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 16404 bytes
font_02_sfnt_off00011178.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11178 16792 bytes

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