Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4cfd58435a49d4…

MALICIOUS

PDF

64.0 KB Created: 2021-09-15 20:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2099f72927ea4d593e73dbd1774ec1f0 SHA-1: a4b8d964f3af738e5a6a4e554d21025070d57e4d SHA-256: fa4cfd58435a49d4bd4a1a5fcf2ccab12c404b3f9e51c768d303f9c93f5e02fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains a large number of links, many pointing to compromised WordPress sites and disposable domains, suggesting it functions as a link farm to lure victims to malicious content. The presence of external URIs and link farms strongly suggests an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8532

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://allytemp.ru/uplcv?utm_term=horrorfield+offline+apk PDF link annotation
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9987b6aaef7d29eef8ec9e4f1ccb543f/33113984948.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/43666866153.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/bce1a73e6d7fd07594b437cf4196a20c/tuvakunevepiriketi.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/92296459559.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/89655063450.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/pebesamowuluzofumutod.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161319afe1ff17---50789339376.pdfIn PDF document text
    • https://curvy.tw/upload/files/sobenasukakugezonad.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/21009866961.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613808fe296f6---57211562688.pdfIn PDF document text
    • http://nineslash.com/user_file/file/logokuwamaneloputizofib.pdfIn PDF document text
    • http://signauction.net/userfiles/file/didixuregebumovetiloxelon.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408b0277380---21942115828.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ec19a69f398891762366d3398a33477d/wenigizogejaleninunaral.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/xativiwezazenoximudure.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/sagisumaxeba.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/66632466269.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///84453019531.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/10935775123.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16135ef5f7f684---kugenamabujepelojatop.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/84869373693.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/336bctq5js8lf0se58e23uahnc/fixexotidofagofoluf.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/jakaja.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/81383266556.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/3924335671.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/gugeko.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD710 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1