Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceddaf1febad612f…

MALICIOUS

PDF

86.8 KB Created: 2021-07-13 22:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be2b1cbb70c2a90e9d1075fed55995f0 SHA-1: b70b320eca794bf85a4760423cf6d2d6b8fc5a96 SHA-256: ceddaf1febad612f762698d80f1f546fd239243096f08cc1f3f8d244d398021f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, despite some being marked as benign, indicates an attempt to redirect the user. The heuristic 'PDF_URI' and 'EMBEDDED_URL' confirm the presence of external links within the PDF structure. The document body is heavily obfuscated and appears to be non-readable content, suggesting it's not a typical document lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.1063

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/~3/7R6buoffwiA/square?utm_term=what+does+sim+mean+in+spanish
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8638ff9c8b53cea2c06e/1626113592662/what_fear_can_teach_us_commonlit_answers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eca514a1b53f2c22612791/1626121492577/84057795959.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000c335.bin
5fe289d3897a48f9819d090c2b5ab7307aa6705a5fd4c9133671dd89ed674639		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC335 25872 bytes
font_01_sfnt_off0000f0fc.bin
119e7ce7ffc13e406211c12d9255802c18fac9e02576ffe28b512ee6d82e221a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 17208 bytes
font_02_sfnt_off00011d99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D99 16792 bytes
font_03_sfnt_off000135b0.bin
70f4ff6763f932584b3e8678ebe20afb8e02607d15222785fdeb725f37572da8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135B0 10504 bytes

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