Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c5695adfaf190c…

MALICIOUS

PDF

75.5 KB Created: 2021-07-16 00:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3730ab7c1cd4e36592974f9f7fe51680 SHA-1: 5f1c10b87b0757a1324f04b66ff1c9da1ea9ca7d SHA-256: e4c5695adfaf190c66fb1a21dce1a62ea8a35a1c6a4ab21d74e07ce6775cfd54
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains an embedded URL that, while currently flagged as benign, is indicative of a phishing or malware distribution attempt. The PDF structure and embedded content suggest it's designed to exploit user interaction, likely through a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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/~3/4P1vZUbBa90/square?utm_term=convert+jpg+to+pdf+and+edit+text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c322ed7e63043962fddb/1625801507171/cairn_terrier_puppies_maryland.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edf4df895aae42f65c97ce/1626207455670/i_wish_this_were_or_was.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0abe6e1d16b1a1e4c2d03/1626385382877/sujusoteseveluwor.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f09603d713d92697cbb5be/1626379779219/59330139146.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_off0000c839.bin
1b4da28d864fe88fb46f2f5d72b6ca3cdc1e4f61a254dc497b96c280cc2e1512		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC839 16004 bytes
font_01_sfnt_off0000f17c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 16792 bytes
font_02_sfnt_off00010993.bin
417bd40d493063b25d81493045b120cd2cb36a629e73c09f543a069ca42ada43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 10788 bytes

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