Malicious PDF — malware analysis report

Static analysis result for SHA-256 085b918f95d6300f…

MALICIOUS

PDF

84.4 KB Created: 2021-07-07 15:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5bde185b70d9d70aa185f929622b1bd3 SHA-1: 0fd9bb8e29d28f2905defefda0f8bdc593d3fd3e SHA-256: 085b918f95d6300f0d80c042c3aea7c0ca640cc5e9a0fefa93949f11ac1e5ce8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=shoulder+workout+with+barbell PDF link annotation
    • https://actorconseil.com/files/file/95226572659.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160737e346d0b9---79439588518.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9c95ac60a---potexijefapuma.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6tnc2ce5rc3agh7mp0tj37u8eo/pekulivadisepenebid.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/5af25793565650ec681e20678a4e1a4a/40021544336.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/fa6a525cfdf592fe4a829cf4a4280be9/nifebabuziwujos.pdfIn PDF document text
    • http://turnyras.lt/Files/file/30923835556.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/taduganowij.pdfIn PDF document text
    • http://gibisch.com/files/files/32404383378.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/94309125368.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/a3ke473r932bdeo66ggpjb23hr/jolutatuvo.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/86da41b6b3a40a2a1e612b6e89351244/24938233922.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ofdjc1r03a1kfdv90rrhm538eu/77322771858.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d1b0efd879558572d67155c451d2ecca/72869634374.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/duxafupo.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-23/20210523234250462530.pdfIn PDF document text
    • http://congtyvima.com/images/Download/56779220197.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/3615059170.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812ddc8b22b---13493392293.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd8c8ad4f---womoziwefumimapawiwojix.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/ee3de8d67192c752b327ca9558f40af9/sanofirevabad.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/83860850151.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/mapovikuno.pdfIn PDF document text
    • 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_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 10568 bytes
SHA-256: 22409a593ecfc8ce85e303389d78c35bb374f4c68bcd5b8bb94fd9ba16fd055e
font_02_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 16644 bytes
SHA-256: 0f16c283a67aeb3b6a4cff8241ea1647d8b4e084f2e90470d0edee7bbc17ca72

Open this report in the interactive analyzer, or submit your own file for analysis.