Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad6c8023a674f22…

MALICIOUS

PDF

90.0 KB Created: 2021-07-03 06:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04afa741de61eac3fc183d649695b7c3 SHA-1: cea892e5bc50659487838036f622b409d5d43e29 SHA-256: 2ad6c8023a674f22947e71d1aa65f9708b70818e6a48b249a218cc55e3177475
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an intent to lead users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=company+introduction+email+sample+pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/0acd7c24015e5e8c5c0f59d5dcf79641/bozogopovuvefe.pdf
    • https://bamfieldrental.com/userfiles/file/bubujituvemawa.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/25170821603.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/104d0d58add1599091e9565cdbb3fe5e/6843010595.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc11a3d5c7---1607625714.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/d350cd4efe291b8222b8a93d3a9ef3d7/45717391082.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/ac35518c5e47b1291d1f02da32a575b2/senopexevexipaxovofipaf.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3d3537de5648c511da704322efc9f6f8/wopevopalu.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba18771c32---botuwofajujeredaxaranomiz.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5494b6bef6---rupodipuwemigolozovonuwu.pdf
    • https://balbok.net/admin/ckfinder/userfiles/files/pidutetetopi.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984da41314f---jomevexunes.pdf
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/wepazinekixasuz.pdf
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/214740349.pdf
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/jenuva.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ln9ijhrjag5prnhu8amo3ln2rg/vutosoga.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/todrolf4cvpu13lq164gtmuu9a/48485590737.pdf
    • https://lapalettedesarts.fr/gestion/file/rikazujurenisevoseg.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160930759cd040---43881262996.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bee24f76f75---55056361607.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c12b54a1adf---rotoxa.pdf
    • http://cuatudongnhatrang.com/uploads/files/xakovizu.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af0e6451b6---97237578844.pdf
    • http://www.ecostroyservis.ru/File/pedab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb13.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 16792 bytes
font_01_sfnt_off00011325.bin
23901a2d3124ba28c8fbeb049bebb31ef0237cce533abfdeaa38befddb102b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11325 17376 bytes
font_02_sfnt_off0001409e.bin
2fcd41cae895e3ebec8da076f6c63a00fcce1946d109582fb5e1ea95aaca2d1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1409E 11024 bytes