Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcd027bf0f66b7d…

MALICIOUS

PDF

83.1 KB Created: 2021-03-21 08:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7ab22bf216e218143cc51dc96538fe2 SHA-1: 2942b7bc0368d7725961d2f244feb65ac159ab40 SHA-256: 3dcd027bf0f66b7dc9163c7ce5f69a90c276d704ab49cee47867499ac7191682
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL disguised as a download link for educational content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The PDF structure and embedded URI heuristic point to the use of external links for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/award?keyword=cengage+coordinate+geometry+pdf+free+download
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5fc6d658b5cb4.pdf
    • https://cdn.sqhk.co/tejurorado/iqjjjeA/hide_seek_movie_2019.pdf
    • https://static.s123-cdn-static.com/uploads/4384644/normal_5ff49e91ba441.pdf
    • https://cdn.sqhk.co/dojaxeje/khhghib/super_snake_cobra_cost.pdf
    • https://cdn-cms.f-static.net/uploads/4378160/normal_604319dd35fd9.pdf
    • https://cdn-cms.f-static.net/uploads/4530036/normal_6056a6f18dd81.pdf
    • https://cdn.sqhk.co/zotenejek/ieES3gc/bisopazilegivugama.pdf
    • https://cdn-cms.f-static.net/uploads/4370089/normal_6013c512e0055.pdf
    • https://static.s123-cdn-static.com/uploads/4423732/normal_5feb6679c0435.pdf
    • https://cdn.sqhk.co/papusabefo/ghboDgg/citizens_fcu_mobile_banking.pdf
    • https://cdn.sqhk.co/zenegiwowi/j8MFCgh/non_zero_elements_in_array_matlab.pdf
    • https://cdn-cms.f-static.net/uploads/4486550/normal_600a147e2ed93.pdf
    • https://cdn-cms.f-static.net/uploads/4479454/normal_602805202fa78.pdf
    • https://cdn.sqhk.co/tijinujul/8Zjiif5/3172157945.pdf
    • https://cdn.sqhk.co/jawefujivi/50jcgiY/tunirifarevabikumubarareg.pdf
    • https://cdn.sqhk.co/sitopizol/E7hhKic/gewupox.pdf
    • https://cdn.sqhk.co/tipefimex/dvEjiGT/tojiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rimejiguvif/xufepu.pdf
    • https://s3.amazonaws.com/getizar/nokia_1100_badinerie_ringtone.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
    • 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_off0000f039.bin
b67805359b044ca2583b4ecf9a3ec12cd84de6e7ef2b14d8b9a1acd5efb7d051
pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 5396 bytes
font_01_sfnt_off00010297.bin
d770443d2e17ad78f14a806f072c9a20844c4d2f3ab9e45c0e0d64fb24146d89
pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 10732 bytes
font_02_sfnt_off00012768.bin
b6a6ca5d1ececf9b8f85cf34f243a5152d852bd6c46ff1fd844468d100e5349c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12768 16172 bytes