Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5493b5a44e2784a…

MALICIOUS

PDF

81.6 KB Created: 2021-07-14 00:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc03e2b953eea33b191d720beacdde31 SHA-1: f798f709516371804ae6eb8a4f0838305034051b SHA-256: d5493b5a44e2784ad856c10e970d38b7aa5f3ff9038a4debb5dff07c7df71189
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and also triggered a machine learning classifier for malicious content. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect the user to malicious sites. The file's structure and detection by multiple engines indicate a malicious intent, likely to deceive the user into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6279

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/razvivatel/yapz/~3/UkUWPC8UKDU/square?utm_term=best+powerpoint+presentations+examples+ppt
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e89e033832431b4408954d/1625857539954/33726386765.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edfed08e89d93564d8768b/1626210000870/6_parts_of_the_microscope.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec84e4e64ce5371634ead6/1626113252841/definition_of_fusibility.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e942a56e267257943be525/1625899685573/chart_for_celsius_to_fahrenheit_conversions.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_off0000dc58.bin
2588ee3b05ed53339a9fd552fe094e50d6f3f4291f16bdecb9e14dd7bb9f3a68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 10656 bytes
font_01_sfnt_off0000f4d7.bin
f4ebfddf31495f2277fd91c66973c698e795a5bdaccfc215e0515faae3f3f238		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 16728 bytes
font_02_sfnt_off00012076.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 16792 bytes

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