Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9747dd59f38c1fc…

MALICIOUS

PDF

66.4 KB Created: 2021-09-02 14:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92ad1fe91d5e16b841bf9a462057e0b3 SHA-1: 065b2fdc6e1f868cc145da55904bc7bcd94c8efd SHA-256: d9747dd59f38c1fc7db053fdb4e8cc40e046b0d27fd0b3326a4272d71ba291bd
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to PDF files hosted on various domains. Several heuristics indicate this is a link farm, with some links pointing to compromised CMS upload directories. The primary purpose appears to be distributing or linking to other malicious documents, potentially for SEO manipulation or to serve as a distribution point for malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4749

Heuristics 4

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://alnoorcity.com/userfiles/file/dopobamis.pdf In PDF document text
    • http://fmmvn.net/userfiles/files/vufamowig.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/jukiziwosajez.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vujasiguxukugas.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161122ddb56f46---98991033877.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/gaduzirorumazamifowejigem.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/20032139460.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/96cee053b3f2d2e798f817d978eb5181/1958195678.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/repalikopux.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f420a444bf---welag.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/kutorunasalalulevaw.pdfIn PDF document text
    • https://termofriz.rs/files/51315688067.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/nitoluxad.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/2d4bu00v4gl9pd0ltbm7h842me/9199483095.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160856ce5c2a1c---14571034321.pdfIn PDF document text
    • http://uniqueaddress.in/crm/files/xifadonizisilaze.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/63919340437.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/fiperumunerofamum.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/tufefukixonovewera.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e10df817a0---xawizewewotejax.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/29109354915.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/lubikejuzopuw.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/62144479498.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/dekodekididotovikifubilax.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/mevodusufowejaxoruj.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/t2uh11ls7u9mlabholrj8a6g9n/kozenakajezafoxedobufexim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fichas+espa%C3%B1ol+para+extranjeros+pdfPDF 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_off0000c60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1D 18724 bytes
SHA-256: abbd3c418b915bd4905ac4c924d60526118963271504dfb7d6a9907630fad56c

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