Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dad4b616664b044…

MALICIOUS

PDF

74.3 KB Created: 2021-07-13 19:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ada85db067cacac6dd58e3fa1b7d7c30 SHA-1: 5e941b292e9965cc2cb25d1f8a214af676774499 SHA-256: 0dad4b616664b044e8139ec7018314f3da71e3c9ac94df3f8aa1df0395f2f1ee
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect users to external resources. The PDF structure and embedded content indicate it's likely part of a phishing campaign, potentially using embedded scripts to facilitate the malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/qI_NY8u86tA/square?utm_term=calculus+and+its+applications+14th+edition+pdf+free
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec84f1ad1bf7105ccc02da/1626113265886/parts_of_microscope.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8f473631fd4ab81701f8/1626115912124/noputolonumekujafaviji.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8b4072e2584f24640b80/1626114880620/fugedonejaligeni.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94aa01448b0619849af98/1625901728623/basuvawutikagifepoxin.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecc947da1bc628e608d674/1626130760070/86732296036.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed992cf90efc25ed740a3f/1626183980320/how_to_paint_trees_in_the_background.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e84d12640b337e331bf6f6/1625836818737/34662514172.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_off0000c08f.bin
951ee8226afb1b2a509975a997e5d9e56158d3e254bda0e0e4aea7109016ac92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC08F 15940 bytes
font_01_sfnt_off0000e99b.bin
4bc8da1c3d57a0782e5b2fb8bfc1d5ba9c2d331ff1865ff5f730ef97ea436b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 10980 bytes
font_02_sfnt_off0001031a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 16792 bytes

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