Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7a938c46500f60…

MALICIOUS

PDF

84.0 KB Created: 2021-07-17 07:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f42ade17e1cae24b67d8354aa79d6687 SHA-1: 57852389409b466b09c96efb0ebc0ef1757b6a5a SHA-256: 6f7a938c46500f606796525703e8998ad9dc02906eed0a98ab389c985322a14b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, while currently marked as benign, likely served as a lure to a malicious site. The PDF structure itself is also suspicious due to duplicate object bodies, suggesting obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/WVKuihPcy9U/square?utm_term=complete+physics+for+cambridge+igcse+download
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edeaaf80caa629c1dd7d6c/1626204847938/52041980025.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efde0c3db90d3c356e922c/1626332684459/78485812394.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f00a4079f953043cbee2b7/1626344000881/nanapojedon.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e857e52f24f427467aa51b/1625839589986/17881528614.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_off0000dfc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 16792 bytes
font_01_sfnt_off0000f7d5.bin
65fdee715d6cb0a3dc1898bd9f8c27b3330ca0eac57dd0a9764f384853203ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 18916 bytes
font_02_sfnt_off000127c2.bin
8a8f360460275e159320e73208278ce76570c5490cf7f91edaf6fe6127c01b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127C2 11440 bytes

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