Malicious PDF — malware analysis report

Static analysis result for SHA-256 be835f8677d724ed…

MALICIOUS

PDF

72.7 KB Created: 2021-07-18 21:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a310be27fb9de07cda046bc00806fa8 SHA-1: 4b5712693f4e2a8af6b184785aadd30bafb16b7f SHA-256: be835f8677d724ed09f6c78358c166f6c23de8a579661bd821072c458761dd32
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as a phishing trojan, indicating malicious intent. The presence of embedded URLs, although marked as benign, suggests an attempt to lure the user to external resources. The PDF structure itself may contain exploits, leading to the execution of malicious code.

Machine Learning

  • Nyx PDF Classifier clean score 0.1829

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/UQ8tT55rDuk/square?utm_term=theme+song+to+the+rockford+files
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e76ee6441d4a28897efb30/1625779942931/city_of_chicago_property_tax_search.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_off0000bc1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1A 16792 bytes
font_01_sfnt_off0000d431.bin
0c6a11cfa5c93c60edd95fe454a1158142ffe4719f929ed9cb0be5ed9aab76d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 10816 bytes
font_02_sfnt_off0000ecbc.bin
47d6810a1db9e6a73387c904b1652494f3c0c290e5f9b9d430f486c14b14775b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECBC 16792 bytes

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