Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bebf26d72b8f1d…

MALICIOUS

PDF

95.4 KB Created: 2021-06-11 17:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0abbfabf55961b8e19244b587a1e82c6 SHA-1: 37e8337f473ea4c436c2f5d9f81b358829603f02 SHA-256: 89bebf26d72b8f1d54a7fac78d9fc3cef84ee283698e20a56e496d2e7a5b1cd7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://synerhu.ru/uplcv?utm_term=ms+dhoni+the+untold+story+full+movie+in+tamil+download PDF link annotation
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba864c2b51---42442330731.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/li3dep59r4b2jf3aal3r3pank5/vodarekumi.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3350f337df---50325168929.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ace6c05198---48769329129.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fbb6696e1---mafabosikelutenamorixu.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5840ebb47---82929185342.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/e862fc44ab93d9d26a666629f114be3e/35770180889.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074f800c9deb---bopoxaxuxetanatomo.pdfIn PDF document text
    • https://room12shio4.com/contents//files/wavomezaxekinazawunep.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607965bd3d6dd---78181647640.pdfIn PDF document text
    • http://championsview.net/userimages/zasagazosuba.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/4a42a7ffb7c6a2b813e66bd02db5c6f0/91425804701.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a60580c458d---92457551746.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/nogow.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/58653370955.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608938bb78d38---vekewibupup.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac82677b8---6853118449.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0E 5404 bytes
SHA-256: fba4f839e80c6ec29db7bd8518246252b63180424a3243488bda42f3dc300edd
font_01_sfnt_off00012166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12166 11428 bytes
SHA-256: 2d386d4ad38a8e8eeac583615f507911eb499bbed6b3111e2bd28c053995de9d
font_02_sfnt_off00014888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14888 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_03_sfnt_off00015dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD9 4912 bytes
SHA-256: 35a8cb731f58b5123c69bd3270136a2025d37958ce7df7bf2d1cbaf157d00eab

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