Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29050b7717fa167…

MALICIOUS

PDF

79.3 KB Created: 2021-09-27 13:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8e8b20a2cba68ab4125ca3a509dc6be2 SHA-1: 84a6837a2eed7707004ad07c5a478dcb6a6c0ad9 SHA-256: e29050b7717fa1679fc96861d588704368ae5005b7a4507f2d3df5a85f2f9aa0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm hosted on compromised WordPress sites and disposable domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure of the PDF and the nature of the URLs point towards a common tactic of redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://krisoc.ru/uplcv?utm_term=xiaomi+redmi+9t+vs+redmi+note+8 PDF link annotation
    • http://itagqatar.zajeltel.com/itag/file/files/vawavu.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/18721683575.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/kufixebubuzasilapujoweg.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/21298581942.pdfIn PDF document text
    • https://mcgbaharat.com/userfiles/file/zufupizekufigova.pdfIn PDF document text
    • http://velisend.ru/photos/file/18806665417.pdfIn PDF document text
    • https://kristinanamaste.eu/files/29795541719.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c9aa8e3b4---wumitumonino.pdfIn PDF document text
    • https://hgb.se/filer/file/vixuras.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161318c4e44f66---rajonoxebaxem.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/netudenadodawovas.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/wogedepanobi.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/jujupixusemobasapukibit.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/35237839263.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/wemelopirawajazuze.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/saxiwuxepokatitesipe.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/rafobupoxu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149f293bd040---72765910332.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130240d20188---laferapezukanipa.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/78837069805.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/98719595583.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/78280454351.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/98645280467.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/dikukijixigubegawurade.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_off0000c847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC847 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 10812 bytes
SHA-256: ee6f2ea0d960402b989ff5b78882cc08a5619e5d814405aa8d7c9332f1798e14
font_02_sfnt_off0000f94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94F 20940 bytes
SHA-256: b33528008c07e76096673e0f747773cd645ef8d9aae86fdc4a84bd2302d02468

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