Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fb6784a3f9d190…

MALICIOUS

PDF

80.7 KB Created: 2021-07-16 13:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a709aa11209ff4846673c13c85b027f SHA-1: 7c79dbf74de0dc735d8de6efeb778c74ef79ea90 SHA-256: c5fb6784a3f9d190b7f0d588eb3aa686cad64548758a17ddd680594816146d5f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs, suggesting it may be used for phishing or to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious intent, likely related to delivering a secondary payload or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6329

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/~3/0YvHz_IItD0/square?utm_term=trading+ex+rights
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec939480388a1034d863cb/1626117012669/netut.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f130346186c43100439872/1626419252837/oxford_evs_book_for_class_4.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edd26a30d23a7550621711/1626198634826/emmy_nominations_for_watchmen.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f15223d1d8e65aae883ff6/1626427939778/rin_kagamine_daughter_of_evil_cosplay.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e807774aaab0286a8c4973/1625818999614/the_rocks_energy_drink_stock.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e90f62dc37083541b80141/1625886562915/zugedagarokegixupigepa.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_off0000d524.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 16792 bytes
font_01_sfnt_off0000ed31.bin
0a4af374cb035e676210909e4790276a619635896d879aefac6ffd5912e9aefa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 1668 bytes
font_02_sfnt_off0000f521.bin
2351f83de5e5210194ff61fb678dd7ec011ad24403c0ccc2d1a6078d924d57c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 16420 bytes
font_03_sfnt_off00011fcb.bin
d9034549ad4349a52c9557a657ef06c497655fc03195a05d91b48b0af94d8752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCB 10428 bytes

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