Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8612b1972a717a…

MALICIOUS

PDF

80.1 KB Created: 2021-07-15 18:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00bee57f7e86d326dd96db04e7cb271f SHA-1: 2e5fae4922c735abb341f49ada1f31be26e5795b SHA-256: 9e8612b1972a717a63345c5e28f1a2f1cb7605bcb99b1715f0e542abf2665b69
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a potential delivery mechanism for further malicious content. The file's structure also shows duplicate object bodies, which can sometimes be used to obfuscate malicious content within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/NsX9ihectO0/square?utm_term=wow+classic+rogue+bis+swords
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edd80c4c056a31b81a7224/1626200077007/gonudabewazi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7721d9561735a16c4caad/1625780765271/charity_shop_furniture_collection.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eff2ce16a6d35a11126c63/1626337998326/mete_out_punishment.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edbd229d975b6409e42251/1626193186201/74546005967.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eff12dc00d13116b438883/1626337581505/nulobunajar.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_off0000d5df.bin
251392cfcf73f9c154a7e8bd5a974ceab2f47c533ec8262f2a30565105288b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DF 10664 bytes
font_01_sfnt_off0000ee46.bin
fead36ece30f72bb1cab198d8d8b64548e3ca21481c5b9d023896bfe6cc47eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 17660 bytes
font_02_sfnt_off00011ca7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA7 16792 bytes

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