Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbf363a18f423a6…

MALICIOUS

PDF

77.9 KB Created: 2021-07-14 09:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1adc016f665575d94aa3515508cba6c5 SHA-1: fa0f1cf6573e8b070044bcc23d849e368de0b5d1 SHA-256: 3cbf363a18f423a6d68643c57e68b384702a137ed4ce21e23147642a4a065e04
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 phishing attempt. The embedded URL points to a Squarespace domain, which is often used for hosting phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect the user to a malicious site, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7310

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/UkUWPC8UKDU/square?utm_term=all+about+rhubarb
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8a554ac992910e9dc4a6b/1625859412379/bekotepob.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee530cf72ce0266e114cb4/1626231564546/tools_for_mindful_living.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee76dd7dee9f188f7bc768/1626240733559/canvassing_politics_meaning.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_off0000d5ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EF 16792 bytes
font_01_sfnt_off0000ee05.bin
dff6def546eb7563245fe9b030eb3ce9fd4c570227b3a83aacd4f2649755f006		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 9928 bytes
font_02_sfnt_off00010419.bin
4b75fe295d5ad4609c5bcb40fac8fdbb329231336f91c1cf247cc37aee4f8b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 15612 bytes

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