Malicious PDF — malware analysis report

Static analysis result for SHA-256 8517e769d6fad1f7…

MALICIOUS

PDF

69.5 KB Created: 2021-09-06 13:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c0825200fb14267f6584f88d40791b46 SHA-1: 3d7ab7e021f03623b1faf6a29841ed70e5eb5ab8 SHA-256: 8517e769d6fad1f761ff51f88b740144d15428320d0988f1c3e43d967ff8b773
156 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 a machine learning classifier. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads or hosted on disposable domains. The primary goal is likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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
  • 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://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/joxigajavinebezosixidejoj.pdf In PDF document text
    • http://eros-arena.de/eros/userfiles/file/39688866681.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef40342808---fulepuzunevuloja.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/vabogefeva.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b922cc741037f5fcd996708cf2ca17a9/87594818218.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/pefokimifix.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/13106631576678db90d20426fa1eb841/pafumo.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/1069214370.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613056746fedd---pevujupusisirigij.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/29421661910.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/002426bd6d7b7ebc5928776f3a56dafb/busixidopuwozoxaka.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/037598e51a37e9d72ef3728a5fd74ca5/ranomesamugevabix.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/koketaxixeb.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/kivefegonevajurebuzabog.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210520092312618859sy8nvc.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9ef76d6b3bfbb5afc11498592c28808d/fotada.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/90446411400.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c713dee4877---4258035499.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799d2e2ce44---85374151977.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/detisutasumezinemufa.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/74dfekp23ui66hm2j1kuurd6t0/68994165230.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/25008961165.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/pagizuza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=jurnal+agama+islam+sd+pdfPDF 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_off0000b259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB259 15204 bytes
SHA-256: e8c4f45c8df96bb7ca5f5b64cdf8b1dafac90ba309af8103968a755945d6d590
font_01_sfnt_off0000d908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD908 10580 bytes
SHA-256: f71ec359bd1144d631419e3684df93f58246203556ffb75734ec7bef9604f38f
font_02_sfnt_off0000f0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1