Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4b76138aeed670…

MALICIOUS

PDF

78.0 KB Created: 2021-07-19 04:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4dda5e6728bcae76dabdb218303fd68d SHA-1: 7c3dd3edb2adbac9bed7983bce3c21d87fb265ab SHA-256: cc4b76138aeed670865fd1650ec788f018b66fba4f34962adf37ce401cca6cbc
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic for urgency lures suggests the document is designed to trick the user into interacting with embedded content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or credential harvesting attempt, potentially leveraging JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/~3/7R6buoffwiA/square?utm_term=iliad+book+6+questions+and+answers
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1c4297634d856db648dde/1626457129935/18399367012.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4575eaba5f52989b2f6ce/1626625886904/lol_colouring_pictures.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91a67f107ff2467e8c66f/1625889383285/fiboj.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed073adacdbe35d6253af7/1626146618733/force_between_two_parallel_current_carrying_wire_is_independent_of.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f3ee376f491d4a1ff7832e/1626598967651/30079950150.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a58c247c7e0f02642fb6/1626383756790/lisedaneg.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e85dbbc338a5640b9d27ee/1625841083665/31086768034.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed1972ff6d86145b9c8bc7/1626151282625/tusegepefogix.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee33a077e2cd4113ef43ea/1626223520859/dense_population_meaning.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_off0000cc44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC44 16792 bytes
font_01_sfnt_off0000e456.bin
ff3eb256ce033bfa569bb82f58606d297709e021ba6a2ef76b39751ef680eb03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 17016 bytes
font_02_sfnt_off000110b3.bin
4b3c33e06a59edd7d6914ff1ebc552a64b1fa3c34e7cc6679f86524ad0e9f405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110B3 10924 bytes

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