Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fe9208c6c44117…

MALICIOUS

PDF

76.2 KB Created: 2021-07-14 05:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a797129bac162531454203fec33415d9 SHA-1: 520fe882a93c840d1a9320cb0b6b151c7d9538d9 SHA-256: e4fe9208c6c4411737f6e58e6de2835898ed4a35da942e1015ad0ecee685055b
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 high likelihood of malicious intent. The PDF contains embedded URLs that point to external resources, suggesting it's designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may leverage JavaScript for malicious actions, such as initiating downloads or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/pL_UGxDroB4/square?utm_term=tom+and+jerry+talk
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee4537f6c772366d2eab6f/1626228023627/authentic_leadership_questionnaire_walumbwa_2008.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8f778aa30721e65ed4405/1625880440509/suxulupisewegovaku.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee01ddf6d8087912c27487/1626210782117/specific_forms_of_poetry.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_off0000cb05.bin
470dae8487d5ea36e99301aec007b1bf4e4361e7fa53637e0e0578c285dad72e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB05 10448 bytes
font_01_sfnt_off0000e2bc.bin
3c2d3a376dc20de47ac63e85172041ac26ab0fffdfb2c7a82bf7f7215a6ea055		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BC 16636 bytes
font_02_sfnt_off00010d5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 16792 bytes

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