Malicious PDF — malware analysis report

Static analysis result for SHA-256 c889b303d845afad…

MALICIOUS

PDF

69.9 KB Created: 2021-07-16 17:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 7f4bc23648740cdfead25f24f8fa83c0 SHA-1: 9334fb9d1096e56c5f1452ea8f58d0d453456615 SHA-256: c889b303d845afad47bc68995ac63e5def2a454db66cc2ce596182fe45d5e24a
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress upload directories and disposable hosting. This behavior is characteristic of a link farm designed to redirect users to malicious sites, likely for phishing or malware delivery. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4785

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 http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/pugukosesuzixetoluf.pdf In PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/11b960bfe2caef2ee4f3f6f51ab6c5c1/wapadawa.pdfIn PDF document text
    • https://pmms-online.com/assets/file/domesezel.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/77536819988.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/353556029.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/94752814725.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/996b4190513402db0758a81c9569b403/botesituzij.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef81759c54---55376053180.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8796c9a62a---nubaranuvogozarif.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/a512d130105090997585cf07c9fecb0b/bifulakemiz.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///76947605411.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608611bab9b05---31208445140.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/f2026fccb4b49daa96ad6c07cf66e6e9/revapafiposatatetokoxid.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/7406175274.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607cae338a97e---jegodunimiwojamup.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/2ae815f8864337500d27b3a1ab8887ce/47705249052.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7a388505g055qimadasdhl40l5/kusimuguxetasovavaz.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16098369ab5d4a---83269931924.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/7937150197.pdfIn PDF document text
    • https://shidoremicrosys.com/media/gijidumuvirupawuvajafo.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/t1kejede1739pjj86330itlma3/goxanowumujod.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/gamubasavekaxifivu.pdfIn PDF document text
    • http://jaatkinson.com/userimages/74602897005.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/kovogatetazelanun.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/13822179456.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c789112aaba2fded0d6a60e2a78554a2/vuwoka.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/sewifotij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=what+is+the+difference+between+mass+and+weightPDF link annotation
    • 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_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 10976 bytes
SHA-256: a11749b4414343d5f956011c85fd19d2d3cbd816d317aeb225b82dfee780edb4