Malicious PDF — malware analysis report

Static analysis result for SHA-256 94061a43fac7d3cb…

MALICIOUS

PDF

77.3 KB Created: 2021-07-16 21:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7b8a6225ceb750c788ded8bd7130c573 SHA-1: 7ed382156bd567a5955668c92b60554238f9751d SHA-256: 94061a43fac7d3cb744b1ca38e1fd88b2406d2ae00ef9a03b638ced947850222
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to external resources. The PDF structure and heuristics indicate it is likely a phishing document designed to trick users into visiting malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/razvivatel/yapz/~3/AG-UZpNbJGc/square?utm_term=spinning+flying+fairy+toy+90s
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8bf5a3601b306b46f87e0/1625866074785/just_mercy_chapter_6_summary.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e77ad17d8cdc52e747973e/1625782993563/worksheet_on_active_and_passive_voice_for_class_7_with_answers.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e929192f3c4128e18a9149/1625893145877/project_analysis_and_evaluation_question_and_answers.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee11d88e3fff2bd3bd0d27/1626214872746/juvikadewirobipepixadilos.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5c14fb3cc800db577993/1626233876905/tv_empire_tycoon_guide.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed9fce3680ef421b54e300/1626185678694/what_type_of_figurative_language_is_personification.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_off0000cb3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3E 16792 bytes
font_01_sfnt_off0000e350.bin
e8b5f367f275af970964f4a514be39c8cc2186df14f8f429317a64abfb2488bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE350 17156 bytes
font_02_sfnt_off00011033.bin
08a665524da9574b5540506b7627476bc0922730a42239640856e3f699784bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11033 10880 bytes

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