Malicious PDF — malware analysis report

Static analysis result for SHA-256 90cd0c64fe06bb51…

MALICIOUS

PDF

66.6 KB Created: 2021-03-21 12:35:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52f3ba5fe7b2cff5565ed2a5a6307582 SHA-1: da5e44b73e2e893a6c60e599f485f06acb4ada14 SHA-256: 90cd0c64fe06bb51f7d7c4b14064b12afa77292888e58c4e8c395829ba0a329c
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://dugedepap.ru/award?keyword=ion+implantation+process+in+ic+fabrication+pdf
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/9049809.pdf
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdf
    • https://cdn.sqhk.co/purorenutuw/iWijlib/catecismo_da_igreja_catlica_gratis.pdf
    • https://cdn.sqhk.co/xipovowimugo/RifWuha/difiwitelinaliri.pdf
    • https://riwozetamozu.weebly.com/uploads/1/3/4/3/134331456/b2434e8f.pdf
    • https://cdn.sqhk.co/daborofus/XNjj6ji/43699560306.pdf
    • https://cdn.sqhk.co/noxomosanena/sqjhhe0/fun_spelling_word_games_classroom.pdf
    • https://cdn.sqhk.co/jevamivuvugi/ehbjKnx/puzite.pdf
    • https://cdn.sqhk.co/ravawiku/hhSrhiB/3d_sandbox_game_for_android.pdf
    • https://cdn.sqhk.co/motulobugaji/ieUnSii/xatisobovuwotufe.pdf
    • https://cdn-cms.f-static.net/uploads/4417535/normal_6022a9c95048c.pdf
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdf
    • https://cdn-cms.f-static.net/uploads/4424637/normal_602078579de2a.pdf
    • https://cdn-cms.f-static.net/uploads/4470207/normal_60554b5c28c22.pdf
    • https://cdn.sqhk.co/guvevifowo/ZOB7lie/mega_man_9_mobile_download.pdf
    • https://cdn.sqhk.co/sevigexew/NhgYSia/nisomelarolazatisevovom.pdf
    • https://cdn.sqhk.co/jedabawefi/ehdjfji/befelok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nilafafakem/91107602521.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/bingo_games_online_no.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de68.bin
db8667aa17b11b7f3472eccb1ab7b62046b699c0450cade64cc63b91f5f1ec80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE68 5380 bytes

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