Malicious PDF — malware analysis report

Static analysis result for SHA-256 e676d4bf3ab5a762…

MALICIOUS

PDF

63.7 KB Created: 2021-09-14 09:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 525eda802463da3a90ddfaf8d92aae93 SHA-1: ded41e7c2853eb6e88303b74deb7fb6d2e7fba73 SHA-256: e676d4bf3ab5a7626f38b7c0f0533a6a04a932b7036bfa22e78125883a853a9b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm or distribution mechanism for further malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links. While no scripts were explicitly extracted, the presence of numerous external links and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

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://windowsplusllc.com/ckfinder/userfiles/files/voripasifivuvagijewalex.pdf In PDF document text
    • http://monterroso-construpuntos.com/campannas/file/gipizidunepapot.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312db838d69---22897952889.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/32758070807.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/sfdr5ee195nmoeoi373msq90n6/pepovikobadiwaziguni.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/46173427602.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/malasobanuje.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/kowipipesalufixadisadusub.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/larawevebefexotofim.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/11069768633.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/90412357624.pdfIn PDF document text
    • https://edarky.net/data/file/lomoseduti.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210901050338815.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/10568631810.pdfIn PDF document text
    • http://szjg.hu/images/file/jufiv.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/rijesogiwuwebad.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/sujusur.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/69087338304.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161334c2dc2d28---fexokebelufegototupave.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109111422289847.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/puxekanorukojanogizerelul.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/90285780413.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/letezamibegemizob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=next+avengers+heroes+of+tomorrow+full+movie+download+in+tamilPDF 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_off0000b6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FC 16180 bytes
SHA-256: a1221f63ad0fce14fed9b0260e83a0ab993f6602f0f93e20718925be4bc98856
font_01_sfnt_off0000e04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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