Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10ad4ee286798a8…

MALICIOUS

PDF

75.9 KB Created: 2021-07-13 17:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e017fa0a58b7b5531faf32f4de233fe SHA-1: 1272f37ad935e6edbaacbad6343d99a783b966e3 SHA-256: f10ad4ee286798a8d4ffebaa17c77be7c3a564e6e5c9dbc44d5fff6e4b947877
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection indicate this PDF is malicious. The presence of embedded URLs, though marked as benign, suggests an attempt to redirect the user. The PDF_URI heuristic points to a specific URL that may be part of a phishing lure. No scripts were extracted from this sample, but the overall structure and detection results point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/RVI1sXQGPkU/square?utm_term=broiler+farm+project+report
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecaa639cb57f380a7b5da1/1626122851325/it_is_also_called_the_cardiovascular_system.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8cfb4f558d0bf39c6e32/1626115324073/kojumesoxuretowovezibova.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec82b020781e4bb11bd23d/1626112689093/58961288376.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_off0000c71f.bin
cc482150b7bc91b93826819b5134c4487154f6abfed912d0e205904edb2f9b98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC71F 17144 bytes
font_01_sfnt_off0000f41b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 16792 bytes
font_02_sfnt_off00010c32.bin
b728cdf3a0688fcfe88d1999986301ef7a37c570299deb0b4cc7ef4bb51c63a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 10552 bytes

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