Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc84259b4812e4b4…

MALICIOUS

PDF

70.7 KB Created: 2021-06-26 18:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bf1763d7cf7ea4e99a63fc934a5b614d SHA-1: 27715a3b19c0eb66905e92ef452c452515c73909 SHA-256: cc84259b4812e4b4b34d986e356d114bb8db7217adfb49969d14dd514778a6e8
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs are part of a strategy to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6664

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://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/mvrdbqa9kkbh9nqmqe41cgb70j/47876792984.pdf In PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f82232a6c2178c7b91d7cab447ed0d0d/bojabumeremabudemogef.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/woxatutur.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/c419690eaff8ca98f89f7e26a73e8f87/jositiwijuru.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7f9ecc6b---29616968167.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb4fe05f40---tojedogudalebekizujuz.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4002b7d03---21041976643.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/79236862376.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd425ee9e74.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c197f7800ae---lasim.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/q33es0p0icoglqcmubhnnrva9k/64457841741.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5315f4191c---sejibonedarewosugonuj.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/36918355520.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace28fb1b03---32919028685.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bce5be9c60---98084470774.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/5346180dca50c075fe6d2ca0e7504dfb/bakirujuzalodemolifen.pdfIn PDF document text
    • https://kuepancong.com/contents//files/vusunusutuvosirixik.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/benesepajevuzuzugulugone.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/59302170557.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160aa90e381691---ganiwijokojevajaka.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce1af4b1ae---93214120896.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0df37214c---fumarabul.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/4ed84b295405b93694043e895a7a6e43/49374227524.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/70848485426.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=isometric+drawing+and+isometric+projectionPDF 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_off0000ec5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 10980 bytes
SHA-256: 5d2d664d4f7d26809d038b100df91fef808caccf0c2d33e142a133d6526a1710
font_01_sfnt_off000105a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1