Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfbe483216693c6…

MALICIOUS

PDF

81.5 KB Created: 2021-08-01 14:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7262c5744a03885720263253d4c68625 SHA-1: f0fb826b3dc82daf1d59dce943653e3c6c63e0ff SHA-256: 0dfbe483216693c66409ba88fb7ad285601144b6a625d00877529a776fa80196
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO poisoning tactic. The embedded URLs are likely intended to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4094b37079---16453807980.pdf In PDF document text
    • http://aloeverajuice.cz/files/file/21587828970.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8ab1bbf3---xodovemakodizotuke.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/xidurowazebukusiz.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/35291071342.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/sesajinowep.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/55874942707.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/xalezikufe.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/83145311275.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/97f86ab54a2661b2b359616145794e73/52015908668.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac022a661ae---nebixujumonetovep.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860632a72c6---nowirunafesomovipijiz.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081fac93b00f---fomanodifonusi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b65628aea8---zoruburinupobosifages.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210604_B0463EF1E9F5CDF5.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b9558c058c02df49f083eeeaad735693/febagijotewemifanufatodaw.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/37149938065.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/60837719943.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/k3t8kd98pamnr2f98pilunmfls/sigepa.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160adfeb14732c---86810225184.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/ludedajajerajoxuwukofasi.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783e099fcec---3459749308.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/5661643188.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/712f2ac36e9e2b4ff3a8a4b258eca5b7/7542100616.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/sevagakuwopemawewabiruf.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/15101954313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=dimplex+storage+heater+wiring+diagramPDF 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_off0000d7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F5 18328 bytes
SHA-256: 6462ed55664be111cb43d9597df491668eaf0ee963bc7aedd3c8d12f305f5e6e
font_01_sfnt_off00010636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10636 11028 bytes
SHA-256: 52e6f9e359e133c8eb92a0c46e5dca275f4334cce7c27ef7b931fdc4bd7d5494
font_02_sfnt_off00011f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1