Malicious PDF — malware analysis report

Static analysis result for SHA-256 769cfc2f18b6d53f…

MALICIOUS

PDF

70.2 KB Created: 2020-12-28 19:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ab926d9e535a787b569721059629b66 SHA-1: 1c297299ae5713346e7a8030c48051b0a4994536 SHA-256: 769cfc2f18b6d53fdc7ce96a060b4a1e0da271e1ae495dc8e6829156943fa3bf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a financial context, which is a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=a+change+in+revenues+between+two+alternatives+is+known+as+revenue+or+incremental+revenue
    • https://cdn.sqhk.co/wevexifimur/ijhh6hi/x-_plane_nvidia_control_panel_settings.pdf
    • https://cdn.sqhk.co/mutexeze/digiaAz/cake_recipes_with_buttermilk_and_sour_cream.pdf
    • https://cdn.sqhk.co/makafabakuna/jfheYz5/49075235174.pdf
    • https://cdn.sqhk.co/momebuman/haiaiaY/king_s_college_london_business_management_ranking.pdf
    • https://cdn.sqhk.co/gujadozede/2hhhgjf/cobb_theater_tyrone_showtimes_tomorrow.pdf
    • https://cdn.sqhk.co/bogebumemilo/hgifJgg/does_music_increase_productivity_at_work.pdf
    • https://cdn.sqhk.co/bojojiweg/hpOgerd/love_quotes_for_girlfriend_from_the_heart.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1dd79abb-5408-407b-95a5-3f845040064c/zasuzozoxaluza.pdf
    • https://s3.amazonaws.com/tetazino/lunikanagewu.pdf
    • https://s3.amazonaws.com/wulotugadag/kobufebifed.pdf
    • https://s3.amazonaws.com/xupovobejanam/letter_of_recommendation_for_volunteer_work.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c73b.bin
2806111c7dba3aa82714395214878a52daae5e61850dd8df5a5224c2f3e91fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC73B 5440 bytes
font_01_sfnt_off0000d9a0.bin
ed31a622850107f8fb5e3304b21a467722945babae5e01ff70fdffc71a260214		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 10400 bytes
font_02_sfnt_off0000fd35.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD35 4324 bytes

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