Malicious PDF — malware analysis report

Static analysis result for SHA-256 3387fcf50245dd22…

MALICIOUS

PDF

129.0 KB Created: 2021-07-13 17:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd9e30f46b80bdfc2e5a66bda33f5de1 SHA-1: 84325636901a8354bdf0d62e859ed398dd859b34 SHA-256: 3387fcf50245dd22560aecb4c3c6c4af8907a76f522a067df665970fe1481bbf
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan'. The presence of embedded URLs, even those marked as benign, suggests an attempt to redirect the user. While no scripts were explicitly extracted, the PDF structure and the heuristic firings indicate a phishing or trojan delivery attempt, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier clean score 0.0968

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/X6hrLWyzjlw/square?utm_term=evidence+for+the+theory+of+evolution+answer+key
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92c53f492d21a0f6b40f0/1625893971207/javascript_find_object_in_array_by_property_value.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_off0001983b.bin
ef8536301309db549af9216ea00bd00c6eb904aaa9ecbdd5fee527efb4d333fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1983B 11012 bytes
font_01_sfnt_off0001b1df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1DF 16792 bytes
font_02_sfnt_off0001c9f1.bin
9ff471d4da972928b2879b46ef05991feb7fc2065cc821c9fdee7b8e7347a9fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9F1 17888 bytes

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