Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8f3e9c9db2009f…

MALICIOUS

PDF

77.6 KB Created: 2021-07-13 18:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6fc3e620b7494f6109134a98ad99cc55 SHA-1: 35a57b2f1203a91264c1fcae70713cd16bcea892 SHA-256: ec8f3e9c9db2009fab4dea86d94be6f10f50546c351e88dca8fd267fc0a2817f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded URLs that likely lead to phishing content. While no scripts were explicitly extracted, the presence of PDF_URI and EMBEDDED_URL heuristics suggests an attempt to redirect the user to malicious external sites, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/nCRFBnYrBHY/square?utm_term=gallons+are+in+a+quart
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90ccddefa333328a9b7b6/1625885901486/bill_nye_living_and_nonliving_things.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed4bb167dd777ebfbfa221/1626164145488/mitochondrion_definition_biology.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7877a2730f713565c6bf3/1625786234720/84859299079.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed8a68cdb2ce13c527ffa0/1626180200505/87930695294.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8803668ba31612b6886c/1626114051258/gafiwi.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_off0000cf98.bin
8d704f9da86d247e1c6f2427eccb0d422e990e0984951e160d2cc32e6509cdb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF98 16588 bytes
font_01_sfnt_off0000faec.bin
57032a3f7c3bf25ca232b1b1cdfb271559566d42d81509dc9e4ef60a4d39a0fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 10388 bytes
font_02_sfnt_off00011293.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 16792 bytes

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