Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dff9493e22b2aa3…

MALICIOUS

PDF

84.2 KB Created: 2021-07-17 22:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef14b2263a7d7d86ec541fe1b8cf3482 SHA-1: c9ac82a11790ca32e7035d926cc4ea1587507295 SHA-256: 2dff9493e22b2aa3fd934e8d07d2fcac8f474f45ae41721dd723c75f32b9646f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan, indicating a phishing attempt. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect the user. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and the nature of the detection point towards a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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=birds+of+prey+streaming+sub+eng
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f13e75f9088a713e6af4c9/1626422902074/santaclaus_is_coming_to_town.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8edd8e51f1f218d67b01e/1625877977086/simplifying_algebraic_fractions_worksheet_with_answers.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee4017f6c772366d2e52a6/1626226711708/xomemimejitewen.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca893bc6eee4b0591daad/1626122387903/vavunaputotivemes.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_off0000e398.bin
38c1e6e0e780bb2a983beb584239eba512ff7ac9d857f1c3777df4efbf9f677e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 18268 bytes
font_01_sfnt_off0001131c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131C 16792 bytes
font_02_sfnt_off00012b33.bin
810156a36171a2c92d0bf5c7c3d0ef4dd5b4620ce71bb225e2180a12a95194f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B33 11200 bytes

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