Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccb5f852404c9a3…

MALICIOUS

PDF

81.8 KB Created: 2021-10-06 03:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a9cc30ed8bdffb2b1c8eac72cc0f2bd3 SHA-1: fab6c523cba46616ca3658d3e1a24fdedde7d134 SHA-256: fccb5f852404c9a3781ce24187a093ba16277096deeed1b1161fe8ae888b82a1
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ClamAV detection and the presence of many unknown reputation URLs suggest malicious intent, likely phishing or malware distribution. No scripts were extracted from this sample, but the structure suggests it's designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3499

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://munnarteabungalows.com/userfiles/file/52260666238.pdf In PDF document text
    • http://verynailscm.com/user_img/file/wizekefamibo.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/62018933599.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/ruwizokavobo.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/5503119529.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/lokedalirasote.pdfIn PDF document text
    • http://ubest.ru/images/file/berom.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/67113494560.pdfIn PDF document text
    • http://ortosprendimai.lt/userfiles/file/pigivixitiwosipuja.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/fimigakuwofabojuj.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/dukabefus.pdfIn PDF document text
    • http://119pump.net/d/files/74321140718.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/82273515370.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/mofomobug.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/fijepobegibuze.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/88071312926.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359cf491cc8---4576309795.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/17959300886.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614265393aba0---63350129693.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/xumokojap.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/fodugezunofegixujafobuxa.pdfIn PDF document text
    • http://theponghop.com/upload/files/kafodilelomemituv.pdfIn PDF document text
    • http://netlandschool.cl/files/53954810295.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/50813251872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=menkaure+and+his+wifePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 10456 bytes
SHA-256: 8769692416a3eaf8a9de9d21fa8f5808f8e728f88bc996db59ce881bb8f4753b
font_01_sfnt_off00011343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11343 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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