Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc43c034b266ffe…

MALICIOUS

PDF

92.4 KB Created: 2021-09-03 06:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 36325552fb33b0d97fcc1bd8948f59ca SHA-1: 380709588d8190ff88dea00b8667134f2879110f SHA-256: 2cc43c034b266ffe2630109a9e3e35f8c427b264e410a058f6ece7af373428e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a942f89efd7---50080013372.pdf In PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/gudotevab.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/0be61547032b2e2b9f410e3c6066d8a3/wonaxexoxagesokozufun.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/vikixuwezob.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fcc37d947ed---93120197797.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/56cq3u69konk8qprnod0tquui0/kasegutunelodudiwotuta.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/7m5j1mh4nkohuf5drh7bck9eaf/90453940584.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/28864643529.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/61206d8416b73b300046031e09c39d7d/pudoko.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/21940670680.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610fb6995f89c---nitabozoxevumiroratunam.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/gisevop.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/pewogegevixiriretode.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/9j75gt1gpsbr4tcb5no73u4515/wokuwemiponolafunetadamer.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/kumifizukodaxavokewef.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/27963197071.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/ca78c368f6e9b22039face3f2a5b5f0b/62081407286.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945aebd71ed---vojevajibewukeze.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/25644973409.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/kixas.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608211181e2c2---54246766341.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129a066d19c9---80326528304.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/16221287815.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/muvewedab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ganesh+chaturthi+2018+pooja+vidhanam+in+telugu+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 16436 bytes
SHA-256: c0c02bd36ce62d069f9a89d5dc1bd42eb1f2bbd9b2fe585c9e6e3411e9a6b62a
font_01_sfnt_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 11904 bytes
SHA-256: 12f7ede8d51d314bdc258be311d27b147a4837afa1dc37cf6ec5c070e19e5d77
font_03_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 24948 bytes
SHA-256: 3b31ed7737e3c8525878856f7429a70a8e7cc46d0f561a850c2c957ed750f261
font_04_sfnt_off000157a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157A1 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8

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