Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b0d07d39099738…

MALICIOUS

PDF

76.7 KB Created: 2021-07-13 03:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d667bb071d3236e1e72421b1e9f496fd SHA-1: 8a7e386b841eec998553b80dd9906f27cfaca986 SHA-256: e6b0d07d39099738a8c63bfbf4d8722296bc957fcd00e2a4b39e6a5175217271
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains external URIs and embedded URLs. The ClamAV detection name 'Pdf.Phishing.Trojan' strongly suggests a phishing attempt, likely involving the download of a secondary payload. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/eaN1Eb74jJI/square?utm_term=planting+pansies+from+seed
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec838e31b0b43e07e6d07a/1626112910654/85796192507.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7ae3a57d2352c9279d56c/1625796154099/kenepuxij.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecab4bdef1ca41d5fd2987/1626123083835/dutuzafobabefoz.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eca99c7d354a5e86a69508/1626122652599/past_tense_of_choose_in_english.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec90f98c19ad4998dc06eb/1626116346018/when_should_i_plant_turnips.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec91e13080d76c7a51dcb5/1626116578029/reading_and_writing_sat_practice.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_off0000cbcb.bin
462ce7299115a5d56a8398e39d9f55211de9626cb07f41f53bba0aa85d98dbe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 16444 bytes
font_01_sfnt_off0000f649.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 16792 bytes
font_02_sfnt_off00010e60.bin
bf9ce6bc3fb0f63d1a19e7493b4d7673ab44d477faa42ecc22adef9257b043ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E60 10840 bytes

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