Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf26ded1515fe69…

MALICIOUS

PDF

77.1 KB Created: 2021-07-17 00:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7baae401e723598ac31249508f58bfb5 SHA-1: 0c584a82f72e33defe6a5c5124e30c6772b43a64 SHA-256: ecf26ded1515fe69bde85fe58328d5cd932c119e332d6cb1c21818ec29e730a4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded URLs, one of which is associated with a potential phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

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/iXsW93xxTQA/square?utm_term=equation+of+plane+containing+three+points
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e805b2dbb92d34f5b05902/1625818546990/vabezobavir.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec718359713006cbdf72cb/1626108292032/airforce_x_previous_year_paper.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edf20ae7c05a5352590c0a/1626206730846/another_word_for_bad_reputation.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e82807687a3d659a4f3b64/1625827335381/26219144884.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee33eb86aa876280bbf9c1/1626223595651/unshed_tears_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_off0000c9b9.bin
7d671f3aa7522979d712cfc206684006b80ed679087133423ad0e86d777ed8d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B9 17340 bytes
font_01_sfnt_off0000f749.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF749 16792 bytes
font_02_sfnt_off00010f60.bin
95331430bd4d85491dcb3d16c9386a8c3a5c05843c5e525acc9bd4997075f6a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F60 10988 bytes

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