Malicious PDF — malware analysis report

Static analysis result for SHA-256 91429e693e9a12a0…

MALICIOUS

PDF

80.4 KB Created: 2021-07-12 21:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca7f8c36f61cc1e51daf9b43ca964545 SHA-1: 0c3ef846398b8f7aaaa35404b918f61fb75ff0b7 SHA-256: 91429e693e9a12a032dfd944d90dd12b0e0eda93064f239fac6e198953eaa428
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. The presence of embedded URLs, despite some being marked as benign, suggests a phishing attempt to redirect users to malicious content. The PDF structure itself contains duplicate objects, which can be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/CHqDoFjlE84/square?utm_term=example+of+swot+analysis+in+food+business
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8c18ad7702a4b9a6f1b13/1625866634478/15611292166.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9273c0cbdad4d35060ae1/1625892668624/wow_starter_edition_limitations.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec78f5700aa07a7893b8da/1626110197935/bexulafape.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e91464defa333328aa105f/1625887845047/rarakofetomegubavugoxe.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e934c7b630645a0ef80273/1625896135204/17782098808.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e93037da2614570b2fde/1625876784634/exit_four_food_hall.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7c7b288cf71862a8db7b/1626111099328/section_21_form_6a.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ccbbf28789513b646542/1625869499352/23533872579.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec88524a8bde38c34550c6/1626114130739/minecraft_one_block_skyblock_map_download_android.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec79754a8bde38c3439ad5/1626110325805/dizibulaxevozitowofekeked.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e87d96d34893089c5a392b/1625849238221/the_quotient_of_seven_and_a_number.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c9721b22c82f862d6ede/1625868658632/41000284373.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_off0000d934.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 16792 bytes
font_01_sfnt_off0000f146.bin
3c8bb9c66c7b047ecb83c7f82235a2f552221afc704a1e37d841d7a39f83d8ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 16260 bytes
font_02_sfnt_off00011b54.bin
933fc1f70b7117efa1c610a2004a503d14e3e02c082c828d70cd3ef0067ec42f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B54 11084 bytes

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