Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ebf0eb4b32856b…

MALICIOUS

PDF

77.6 KB Created: 2021-09-06 23:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: be23be45acfce6e52d3d2ce29016bfee SHA-1: bdd8265e35de4bf2e84f230eda861509f9382044 SHA-256: e0ebf0eb4b32856b26b53f44d0feed778b77196ae0482d9c5bb368d49942317c
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, exhibiting characteristics of a phishing or malware distribution lure. It functions as a link farm, directing users to other PDF files hosted on compromised WordPress sites and disposable domains. The presence of multiple external URIs and link farms suggests an attempt to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3832

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mstreatmentadvances.com/userfiles/files/fafisameje.pdf In PDF document text
    • http://barcabianca.eu/upload/file/zojibakaw.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/fe0fc5b623372bf193c311236bacaea0/nuwejuwijew.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/laxarut.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/16481457974.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/nijozizili.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7cc2e86c5---84950277406.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/pimabo.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/vuzesanuwobaz.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add361c1539---7824231340.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/31216264464.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d049ed5cadb---powuragalegalad.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/99150892339.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/fafetodo.pdfIn PDF document text
    • https://typeone.com.my/ckfinder/userfiles/files/diwudowedadufavas.pdfIn PDF document text
    • http://zahradysnapady.cz/soubory/files/ledipugudedomanol.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/piralakefuz.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1f31d10290cc7036cce150169e5bdd6d/fokegikofis.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ad67bce6f---13934970286.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vumajeri.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/tosuvuxurezafudetanokal.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/beseboxagarowabenaxaw.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c527250b448---revuvulinenek.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/25659428182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=sindrome+de+abstinencia+a+las+drogas+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 11176 bytes
SHA-256: 3a129707347d2016b6c99345a2d2bd595658186104ca3bc17c4bf4d4636f5022
font_02_sfnt_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 17596 bytes
SHA-256: 5536359a097dc55383590aa51187f04ec86dd7d3efc0556dc955d6e67eeb8210