Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f62af0605281ce…

MALICIOUS

PDF

85.4 KB Created: 2021-07-16 02:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cbbf4faf94a8757052fe2359871bbbc0 SHA-1: 367fc9bc3c69765e922ac9bd070c8b886c0a6f39 SHA-256: b6f62af0605281ce8dc0635e5cedbc05ae3fc5f10297b43516a32e5a845f87ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure users to external resources. The PDF_URI heuristic firing also points to the exploitation of external links within the document. No scripts were extracted, but the overall structure and detection suggest a phishing or payload delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/~3/4P1vZUbBa90/square?utm_term=thrust+in+and+out
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee200b8e3fff2bd3be2e4b/1626218507429/fostering_teamwork_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edd3168e89d93564d3c167/1626198807033/who_is_an_omnivore.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee73a3b1dcdf258daaf7f6/1626239907796/ipad_launcher_for_android_tablet.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec84a4ff9c8b53cea2905e/1626113188443/lafujonukafi.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_off0000e473.bin
c9cd7fadfe9657a38672d3138e5b22fd284615eeb0bdd59e7f08a2529870efaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 10228 bytes
font_01_sfnt_off0000fb52.bin
d2cbb5cdd3d57241d7e902daf71caa61743c4d713434996891da825ec49afc1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 21364 bytes
font_02_sfnt_off0001304e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1304E 16792 bytes

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