Malicious PDF — malware analysis report

Static analysis result for SHA-256 08586c596dfe99c5…

MALICIOUS

PDF

76.3 KB Created: 2021-07-16 19:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f284e296469f792d1d2d3124d13ad3e SHA-1: 87fac8c6816b5fd7ee2e2a9f502a041368a72bbe SHA-256: 08586c596dfe99c5c82f0d7a775b74959b4e91dcd3809db79f2822ea828b7c7a
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 URIs, one of which is a Google Feedproxy URL that resolves to a page about growing tulips, potentially a lure. While no scripts were explicitly extracted, the presence of embedded URIs and the PDF_URI heuristic suggest an attempt to redirect the user to external content, likely for phishing or malware delivery. The document body is heavily obfuscated and unreadable.

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/cEZ-xJcQpFE/square?utm_term=how+to+grow+tulips+at+home
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0510a9ad02013e3702338/1626362123026/the_duke_and_i_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0d7dcde4abb1f43911908/1626396637120/wizulizazosutupakixa.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecaa5877250868137077f4/1626122840543/appetizers_for_chicken_dinner.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7c5a497884458c9a0b704/1625802148790/brawl_in_the_family_simpsons.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f09c94eadc271e26e87353/1626381460487/lay_down_roots.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee323f2ee8b51fd934839b/1626223167902/2006_ford_taurus_owners_manual.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edd08ee7c05a535255259d/1626198158370/the_definition_of_aristocracy.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_off0000c8f5.bin
41a238879feda6cea1612d7dbb84b22f0614b339a7ba7c66ec7950914417e5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F5 16672 bytes
font_01_sfnt_off0000f4a3.bin
efad9b3852f42269c22bb2122dc167c9b732e130ee7b6750d60615537d4536fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 10772 bytes
font_02_sfnt_off00010d7b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7B 16792 bytes

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