Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa1400ce135c066…

MALICIOUS

PDF

80.9 KB Created: 2021-07-13 15:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75caf084f58bb4d3f1d1fef79fda45c7 SHA-1: f858c5a9ad88e6c10302501dd068739061d4fdc7 SHA-256: afa1400ce135c066099d0008f3ed3e140d98c487f2defab79188c29b34b74d2d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to a Google feedproxy URL, which in turn links to a Squarespace hosted PDF, suggests a phishing lure. Although the specific URLs extracted were confirmed benign, the overall structure and detection indicate a phishing attempt. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/gPkW7oTCsL0/square?utm_term=mood+of+a+story+definition
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91afc3ba7d954d545f9e5/1625889532665/3447421009.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e869c1347018579c8808c0/1625844161743/13011183213.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9a163080d76c7a52c5b6/1626118678377/converting_numerals_to_base_10.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8519c8cc0c926f56be69c/1625837980855/63955135730.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_off0000d9b5.bin
d15be4f89626b0fa439c5f245b309f74b608af7f52d30563d245179e271d06cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 17148 bytes
font_01_sfnt_off000106ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 16792 bytes
font_02_sfnt_off00011ec3.bin
1378d4a8b765a8219123f978642d74634019d96b81efe8b63faf8cf847cb6df0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC3 10408 bytes

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