Malicious PDF — malware analysis report

Static analysis result for SHA-256 9344868939a4f211…

MALICIOUS

PDF

73.7 KB Created: 2021-07-13 08:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb5186646f7cafb5936dd53a543aeddf SHA-1: 93fc075b011bace1523a2b6cf0033e4500d71de0 SHA-256: 9344868939a4f2113a6d351fee596e60c243e96cce5019a88a89adf335c183f6
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating a phishing attempt. The PDF contains embedded URLs, one of which points to a resource that was also flagged as benign, suggesting a lure. The presence of exploit-related heuristics further supports the malicious nature of the document, likely used to execute a payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.1751

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/CHqDoFjlE84/square?utm_term=label+cell+parts+worksheet
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7afda1f8f93f64aaeae1/1626110717513/what_is_functional_manual_therapy.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_off0000c2fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FC 16792 bytes
font_01_sfnt_off0000db13.bin
953c9e93a857fb96a90d44a8ebe78fd173d67f7c4b38379e0e0d3d690b102763		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB13 10552 bytes
font_02_sfnt_off0000f32c.bin
a93a927e503b60d35509ea77fc7229c69abe46cff4e246a7a73bcfc86e0c1d82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 15792 bytes

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