Malicious PDF — malware analysis report

Static analysis result for SHA-256 717c310c8cf01f60…

MALICIOUS

PDF

80.0 KB Created: 2021-07-21 05:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f0263b5dc85db0c30663cfcd79ec2a0 SHA-1: 49068c24159793a7824a561e3ba91267d8b2289c SHA-256: 717c310c8cf01f603d50d77a46d875046f65de2f9e9394877263e196455370bb
96 Risk Score

Malware Insights

MITRE ATT&CK
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, though many are marked as benign, suggests an attempt to redirect the user or download further payloads. The document body is heavily obfuscated and unreadable, preventing a more specific analysis of its lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/UZrB20b2Dcg/square?utm_term=conjugation+for+avoir+in+french
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f77cbcca10327b0c9c3d0a/1626832060676/ripokiruxutit.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5a31dfda48c61e095f674/1626710813322/back_out_of_refinance_before_closing.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f04edcebd440340548f10c/1626361565101/20131045755.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eff6af1fe2fc56fbe51d13/1626338991358/mojuv.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f775393c1a8e5305459c1e/1626830137704/english_notes_for_class_11_kerala_state_syllabus.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee1855588fb56695118e16/1626216533397/meaning_of_cold_sweats.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f187176e3a8560b3d6bf3d/1626441495303/android_aide_tutorial.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eded41e6792c2552bc661e/1626205506124/43891130201.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8baf9a7bae82fe8959d94/1625864953227/fixemuxutobotur.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f00e98d9659e278646a521/1626345112712/warframe_how_to_rank_up_fast.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e80b599ebc0053f31866ba/1625819993363/digokupipaxezajobiv.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee5faa0981f36585a4568b/1626234794691/indefeasibility_of_title_land_law.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8121651cb2a526cfea3e0/1625821718635/26856270668.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edad7bfe64123bb484b1ee/1626189179572/mejut.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60effab8c00d13116b43e8cb/1626340024604/best_phone_ringtone_download_mp3.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_off0000da0b.bin
c41f6deff104d950eb066c34367853325e21b70648ebb6626b3aa85e3bbf9795		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0B 16160 bytes
font_01_sfnt_off000102b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 16792 bytes
font_02_sfnt_off00011acd.bin
e8d5a0e2e301bfcfa9fe469e378eb870efbd108ce8993889f12b1d6d60cd7c4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACD 10728 bytes

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