Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe0686d3964d74d…

MALICIOUS

PDF

83.9 KB Created: 2021-09-07 11:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fd4e3c11aae4f34874c12d8d1f2773ed SHA-1: 929fc94a3fc31cbcc207982ff5aad74d26c32453 SHA-256: 5fe0686d3964d74d3c4cc3f69af528b7cd325e1841a674aa20d62caaf5e8e657
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or initiating malicious actions. The PDF also functions as a link farm, directing users to multiple external URLs hosted on what appear to be compromised websites. These links likely serve to distribute further malware or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/ilbmimd0nsbgj3jrlojs1b695s/39962234342.pdf In PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2824a1584---81909842701.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/xonipemokegagak.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/7ff9b4534179a8c5d6e1ade51346a788/87284112603.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c94623c94---kiledoxulimuwove.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/73113312435.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/49791635f973c4a4c156624a37dc17da/89201137698.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610f82976e2d0---98281462785.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/16538341685.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/38693284932.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/eecc7a9ebeff86fe1f4fcb9131a5095b/27445024757.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/19015029473.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/xuzetiveridixutokinejije.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/siratev.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/50799847095.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/xafawolab.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/6trs6ctd8lc84l4tmdk94i1nte/pofebesos.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/57441857200.pdfIn PDF document text
    • http://hopkim.vn/upload/files/dovaputokavi.pdfIn PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/49464689986.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0ff9227e6---43033828840.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/voremasitadezinamidedir.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/varemax.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079ffcf80568---fuvoxilurepiburud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=girl+scout+cadette+badge+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_off0000e495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE495 10972 bytes
SHA-256: cfd2981d35fbb71774baa0589ff18211782983171e922cad83bb49787f591756
font_01_sfnt_off0000fdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DA 17044 bytes
SHA-256: 73ec089e1665ac3ef6e69f1eca41bb05fef8d12b1b7d550c60d73d95593f023d