Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d10cdb61884cd8…

MALICIOUS

PDF

85.2 KB Created: 2021-09-03 06:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b1bfd131008e64384cb4b80dff24bbad SHA-1: 3a1546f7c1ed5e568e2918835dd61fe5ec6eb364 SHA-256: 07d10cdb61884cd893f34669794863c67bb8770aa5189edacb36e90a9118223a
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links, some of which point to compromised WordPress upload storage and other disposable hosting. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to trick the user into taking action, likely by clicking on one of the embedded URLs. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://synergyproperty.com/images/files/33605726858.pdf In PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/marijo.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/gukeweripelobevoxufe.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/gitulofoti.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/2749071676.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04a3b6c043---34310759178.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/30c80ccf3240b74940365c606759539e/86959842584.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077e2cb439e9---palusogazagi.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/gse1senp1parmmb7vtslkmsin2/11376233560.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/benota.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/22062618097.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/60430780553.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/15431651548.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/92660881baae05c42c7cc9e9a043f43b/73843926819.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/33396949111.pdfIn PDF document text
    • http://peoplefoster.com/pliki/widiwixotenusuzade.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7415b6f1a---guwusitorusexi.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/77761202351.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16105076d7ae4b---69607571486.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/178e656f9cfd6b351b08afc41848112e/wamedikusetakaj.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/jomoralapupakexolufuloru.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a28560606---84919387502.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/4e1de7d020a9204923223088284f7956/fasamomevuf.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/tomeboxijimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=global+warming+definition+causes+effects+solutions+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_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 17220 bytes
SHA-256: f08615cf99457101ce9bf5299006781764d1d3c5aff30cde07830ce8f8c7d13e
font_01_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 11328 bytes
SHA-256: 8a75965557999d04d9916688ec986424fdda5d65198269276cb5fba8db2e59e9
font_02_sfnt_off00012e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1