Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebab191e617825cb…

MALICIOUS

PDF

73.5 KB Created: 2021-09-22 21:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b6ea10fd6f5b1f7692e95fbe3da525fc SHA-1: 2e85ed073b509a0fb8b87fa104b31b679af05a37 SHA-256: ebab191e617825cb6c26a2099873d74a478533b716cc3b847bee39e94396f003
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to redirect users to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a link farm used to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://banerjeetourspecial.in/ckfinder/userfiles/files/24442723995.pdf In PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/99761551390.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/feruvizabo.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/bozomomugilivufux.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135fd944ad7f---gozutasojokan.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/93493282939.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/duromegununun.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/purexomakak.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/37085754676.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/59299675301.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/tumafulajo.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25907645729.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133dc78cbe93---16451698304.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/9862550946.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/kimagugipuvigevagugux.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_22_20_27_53_5828.pdfIn PDF document text
    • http://thevalleytrader.com/files/51773850727.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613819196d074---nakoxovuraxewali.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/wovewamulavimotelu.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/tubilofimewinaropikuxi.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144569674ebd---balimodisuwepu.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/jatedubilaku.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/60224453008.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=download+minecraft+apk+editionPDF 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_off0000bebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D1 16092 bytes
SHA-256: 756fa4c3ba70bfcd00b8add3fa8d857dd2185a917a3bf124c409dc1c85581029
font_02_sfnt_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 10792 bytes
SHA-256: 4b1beedc708ffc3882ed7586e2b0bf44a7a7b3ec660c9cd8046854ab53608125