Malicious PDF — malware analysis report

Static analysis result for SHA-256 8334b2243527957e…

MALICIOUS

PDF

84.6 KB Created: 2021-07-14 00:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df27b850a6e4291b5260b7497ff6f74b SHA-1: 75b6132910d975b1c7efbf74705efe5824fad7e6 SHA-256: 8334b2243527957ef61f667af2265a9f5569b024669079b34e0cc740d6eff0f2
66 Risk Score

Malware Insights

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

The ClamAV heuristic identified this PDF as a phishing trojan. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to malicious content. The file's structure and the nature of the heuristics indicate it's designed to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4561

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/~3/7R6buoffwiA/square?utm_term=solemnized+meaning+in+malayalam
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee00178e89d93564d895ec/1626210328086/can_you_play_starcraft_2_offline.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec78ddc8b0d544b6d6907f/1626110173587/in_every_case_meaning.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edeec824c32e4364b62c16/1626205896845/a_wild_goose_chase_idiom_meaning.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD52 16792 bytes
font_01_sfnt_off0000e569.bin
9d59ba1b3c3ce84fe6cd2391d092882db1d239f2ef1c4941c0606024fe8cace1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE569 10476 bytes
font_02_sfnt_off0000fcfc.bin
6090cb7d045170041c46d9d591cb305b83ef22457b0659a7344ad8549b2fac61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFC 17412 bytes
font_03_sfnt_off00012aa2.bin
37869fa726a85a72a63ec8b1086cd11b5f9bcd5a8de36a6d53dd0788e95a3321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA2 17320 bytes

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