Malicious PDF — malware analysis report

Static analysis result for SHA-256 7463d1db0231043d…

MALICIOUS

PDF

70.5 KB Created: 2021-05-01 05:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfefae17618247b6e53c91fdf3f1b12b SHA-1: 93266733dafca03e0883e397ecea4c08c56f5c3b SHA-256: 7463d1db0231043da9c3121050ad0260e1ba3ced511d80694cf2e5820066b39b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs and the document's structure suggest it is part of a phishing campaign, likely attempting to trick users into downloading further malicious content disguised as an answer key. No scripts were extracted, limiting the analysis of specific execution behaviors.

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://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/26b9cb1c68b84509cd21f70a48eb0c89/rexubixitilulubanonejel.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0f3bd2561---6142154854.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070fb96885bc---maxukuga.pdf
    • http://accessiblevehicleservices.com/userfiles/file/tozovejizataxud.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/q9n12k6th1bv18bt3k5kgenudh/15141726635.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/3561021968803b5b6094ab373b6a7308/ledimurivujewularija.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/lemdh2deqmher7a4pgqrn07e03/numotow.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160804b5b8e1ae---20468457996.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608350e3a4195---84787174508.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/ffc27e89671307ec28e6e39d4391604e/26595850405.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/2760295a26ab34435f40b00e0040f26a/felugirovapava.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/2l00bvv4ndp4djus4a02c0j1p7/59773834502.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe46ec8150---43697632012.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b904f6ebf4---vetumobepofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=daffynition+decoder+answer+key
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d67e.bin
df1b5837a1de388285b15f8ba46191930a0ac54d53bda4654dc5afe67c4fb74c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 5240 bytes
font_01_sfnt_off0000e88a.bin
7293d7a1aac20638ce396f346b9c4d940893cae75dcdd07786b361950a401545		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE88A 10820 bytes

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