Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b2bde2486b146f…

MALICIOUS

PDF

83.5 KB Created: 2021-07-16 14:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0770307eac469864e316bfa737211f97 SHA-1: a241b9b643a24efb6cbe68c6e81d340136eb3eb6 SHA-256: 76b2bde2486b146f0987f6d95b45720346e85264ac5e4b99a835b7b16156c67d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being labeled as benign, suggests a phishing or credential harvesting attempt. The PDF structure itself may contain exploits, as indicated by the 'PDF_DUPLICATE_OBJ_BODY_INCREMENTAL' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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/k6oGaauGqGM/square?utm_term=forest+sixth+form
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f05c7bc872e80de5b323b8/1626365052085/92728539756.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec83bf5f604029b9918e0c/1626112959088/thorkell_the_tall.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8fbe83836e7a7d61c0dd/1626116030910/logic_puzzles_with_clues.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee8870db6052518eca8645/1626245232560/fish_soap_carving.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f11fee5142327a87415bae/1626415086765/vubelabu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee0187cc8e436e466917cf/1626210695485/download_harry_potter_and_the_deathly_hallows.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e89d787dde1a90ab223d/1625876637415/the_adventures_of_an_it_leader_2016.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecab46e0784948549c3d01/1626123078826/diazepam_effects_on_body.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0f0060a71fd0da9aaaffb/1626402822886/nufarig.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e83373b977dd1475cdb36c/1625830260089/laxupo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e86e0b2a19bc202875d553/1625845259231/novujem.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7e6f71873c46ac93a080f/1625810679516/what_language_is_matlab.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_off0000e63d.bin
647c97a36997137d8fbda6083359a52168ed73552fedfd07b2c44f8dc9750172		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 17020 bytes
font_01_sfnt_off0001129a.bin
d75868b6e0d4bc43fe61bb19df3257caba243502aa5c1e7c5873ac97e037f6e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1129A 10244 bytes
font_02_sfnt_off000129a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 16792 bytes

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