Malicious PDF — malware analysis report

Static analysis result for SHA-256 a779d732bb2942f7…

MALICIOUS

PDF

74.2 KB Created: 2021-07-19 14:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ac70bce3a7c70aecf753e2d63558034 SHA-1: acf8e0c7933044b6f3d23e59dfc1c09348e254df SHA-256: a779d732bb2942f732164c314e106719a380c70547941afe98d90b5a5cb33b9f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI that points to a URL, which is a common tactic for phishing or distributing further malware. Although no specific script was extracted, the presence of an external URI suggests the document is designed to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/~3/1LSSs5qy-i4/square?utm_term=anti+blocking+agent+for+paint
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee1be0462f394a1e3f95c3/1626217440223/sotinuwodifiwulitozefep.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee6a1984a0477e84ae0730/1626237465162/free_planner_for_notability.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f4ca74a9adb72803b7fbb7/1626655348504/4989448812.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e86df78e00cb4bc9aa02e2/1625845240124/52141859402.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee741c84a0477e84ae9413/1626240028131/guild_of_heroes_wizard_guide.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f25c02ec5ad00cc0863064/1626496002524/dimetasonirevepiwa.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edef1cb0089c62dc402c81/1626205980303/64773793214.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_off0000c092.bin
10efd8e446a92bed5b995a95c5f51a550f9ddd7ea0b14cbba2a815f009eb8420		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC092 16756 bytes
font_01_sfnt_off0000ec37.bin
1b3d3047a2cca5ff8fa9f895640d8eb854fbda493c0ea363ae21b7ca771980df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 10700 bytes
font_02_sfnt_off000104bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BD 16792 bytes

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