Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e3fd9d86960ad2…

MALICIOUS

PDF

125.3 KB Created: 2021-07-17 06:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4aedc34a057e9bd488dd20407ab4e8c3 SHA-1: 3bea0f6ad7f4bee747ec812eb3d73a1f7209eeff SHA-256: f2e3fd9d86960ad279f33a6245b49e493a11bdcf62596017233a0d9ab67a43af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits a critical heuristic for requesting recovery secrets or private keys from the user. While no executable scripts were extracted, the PDF structure and embedded URLs suggest a phishing attempt, likely delivered as a spearphishing attachment. The presence of Okta-related URLs indicates a potential credential harvesting or account takeover lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4281

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://${yourOktaDomain}/oauth2
    • https://${yourOktaDomain}/oauth2/v1/authorize
    • https://${yourOktaDomain}/oauth2/${authServerId
    • https://${yourOktaDomain}/oauth2/${authServerId}/v1/authorize
    • https://${yourOktaDomain}/oauth2/default
    • https://${yourOktaDomain}/oauth2/default/v1/authorize
    • https://${yourOktaDomain}/.well-known/openid-configuration
    • https://${yourOktaDomain}/oauth2/${authServerId}/.well-known/openid-configuration
    • https://feedproxy.google.com/~r/sq/ugae/~3/XMoLd4EPXkg/square?utm_term=african+american+and+mexican
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e90cecdb8bb141bad89bd2/1625885932502/29813835997.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f03273b3de5a36b129285c/1626354292079/gaweg.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e940dbb67368755968bddf/1625899227799/zisalawizutek.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f222742e59700d3e519210/1626481268496/3044992993.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_off000189ac.bin
8393e462dfdd589178ee4603912a4eb2db4777b222ca2e491cb9ffb739d1c39d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x189AC 10288 bytes
font_01_sfnt_off0001a0c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0C7 16792 bytes
font_02_sfnt_off0001b8d9.bin
be3b228c1b348b412fdd944537936522469a04d47cfcdae6245899efc95e6ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8D9 18160 bytes

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