Malicious PDF — malware analysis report

Static analysis result for SHA-256 d453727d547ff275…

MALICIOUS

PDF

83.8 KB Created: 2021-07-14 01:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 804c7c2c991f062551d7dbd82047b566 SHA-1: 614b9e7f70e7e23931ff74d0e9796e42cab6d3a9 SHA-256: d453727d547ff275192a53b6f5d9abf73fc8ecd43d5da3946a9dbda37ca726ee
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified by ClamAV as a phishing trojan. It contains embedded URLs, one of which points to a suspicious-looking link that could be used to redirect users to a malicious site. The PDF structure and embedded content suggest an attempt to trick users into visiting a compromised or malicious web resource.

Machine Learning

  • Nyx PDF Classifier clean score 0.0989

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/pL_UGxDroB4/square?utm_term=between+internet+and+intranet
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7c6d29ebc0053f3159082/1625802450820/pojedidurefidora.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_off0000d1b8.bin
6abdb02b428b52d456893c859df039bfe0bbf4583890e71a8cf7b5d85c34d0d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B8 17296 bytes
font_01_sfnt_off0000fedc.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDC 16164 bytes
font_02_sfnt_off00011453.bin
5752493944c1e6f5ea41f779416832b3f3184711e5cd979beffd7ad0afddf16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11453 10044 bytes
font_03_sfnt_off00012ad7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD7 16792 bytes

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