Malicious PDF — malware analysis report

Static analysis result for SHA-256 892de299464375da…

MALICIOUS

PDF

70.2 KB Created: 2021-09-25 03:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96aa8fb1e3d1cab015948b7d524d59ab SHA-1: 69e585ac008f5b211061c9e06764e878e011cc20 SHA-256: 892de299464375daa3647ea0d628c7279bc012c2ae81ca95ec41c0f50f4e4ee5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, characteristic of a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's intended to lure users to malicious sites, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5522

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zekejozsef.eu/FCKfeltoltott/file/14228930853.pdf
    • http://kodemari.info/data/files/tixamozatogikijinux.pdf
    • http://barbusci.it/maisUserFile/file/fijukowozizil.pdf
    • http://profstil.az/userfiles/file/74973067088.pdf
    • http://szm.hu/userfiles/file/26830156961.pdf
    • http://okna-dvere-online.cz/media/upload/upload/file/dekubefimodokomosan.pdf
    • http://toyotarent.tw/FileData/ckfinder/files/20210903_551AC9BDAA37CC47.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/c044dc171651c637a7056bb473a2f692/14427037153.pdf
    • http://cellesekorea.com/ckupload/files/87342269853.pdf
    • http://lex.tj/img/file/25771037830.pdf
    • http://robwalker.net/fckupload/file/xidulojawevovudajawilux.pdf
    • http://biosurfest.com/userfiles/files/53157484094.pdf
    • http://pooq-design.com/app/webroot/fckfiles/file/71069545529.pdf
    • http://baltic-rt.ru/ckfinder/userfiles/files/1252394973.pdf
    • http://kyokushin96.ru/admin/ckfinder/userfiles/files/sarirujodusikagevib.pdf
    • http://music-saikung.com/ckfinder/userfiles/files/2151385541.pdf
    • http://dent-pro.cz/pic/file/belikusewegibenurigujepe.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9caa766bf4371479b82fb950ec0950fb/87392964139.pdf
    • http://aquamedia.cn/ckfinder/userfiles/files/51215168570.pdf
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/penuvukunafoj.pdf
    • http://www.jysunshine-hotel.com/up_files/file/12324454535.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=boku+no+hero+academia+season+5+episode+10+release+date
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/80770755541.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be1e.bin
610ff5957d18698574d4d4b336818eccf9de7ab32e1040262136841b22dabbc4
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1E 11332 bytes
font_01_sfnt_off0000d8b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B0 16792 bytes