Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedd4c743b51a80c…

MALICIOUS

PDF

93.4 KB Created: 2021-07-20 00:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 49eeac40987f58fff44c1c26990b0475 SHA-1: f27fc48bfda960a1f71418b168a42ca5ffe60eb9 SHA-256: fedd4c743b51a80cff54b380cf2592b81b897f049d5a1c599f2c772d32aae4c5
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, several of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure suggests it's designed to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://iwanbim.com/userfiles/files/zasorameriberegujox.pdf In PDF document text
    • http://apricomm.com/userData/board/file/nekotemokalusekuvugoxi.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/14c52dd311d28dc0a6154794245202e2/futipi.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/wuferudolerodefomuzemix.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/53395626545.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/62808546257.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/0l5v23cdjigkt33m0t1ht1nemr/pimazikuvutiduk.pdfIn PDF document text
    • http://nacnsuaa.com/clients/4/49/49ab1acc6c62b5a39110d621a19f71c0/File/mekejawovufumovatepuvagem.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/kigiramupefigu.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2ff88e1a529a9992cfe8f71d424617ee/28241915389.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084aeea73071---94600116334.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e6d255e58---48339740034.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160947984b5e96---wodewijo.pdfIn PDF document text
    • https://egca.fr/userfiles/file/tumizeme.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/63098106248.pdfIn PDF document text
    • http://mytaylormadefamilyusa.com/clients/864113/File/22833511425.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/97755523651.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc16d2e399---66272106984.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021070523595896.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/13adb3d89e3f8ad68881a353c2e3bedd/zenusapibosugikowiba.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/3604223371.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160d92ab16b667---52763976516.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/20814177551.pdfIn PDF document text
    • https://lapakunited.com/contents//files/femububolalujaniwezadij.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/bfp1uik7cklhbr7i4nv8554emn/88100034188.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=foster%27s+home+for+imaginary+friends+episodes+with+cheesePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0001085a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 17256 bytes
SHA-256: 9e0d47321fa2ba6fe2476130e8db966773892229376e8e86b36c3d05bf4b9f65
font_01_sfnt_off0001356f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356F 11232 bytes
SHA-256: efb2b286b9218974402c5c5acb6ed28116cc882e2d83856736d745a794114314
font_02_sfnt_off00014f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1