Malicious PDF — malware analysis report

Static analysis result for SHA-256 8945dcdd08958999…

MALICIOUS

PDF

211.5 KB Created: 2021-09-24 01:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5dabc3e4e06dc66900af818e9c47fb90 SHA-1: d80cf10bac585db2444368f61ac7eb307d8c6ff4 SHA-256: 8945dcdd089589998ed3de2d337c107ea97e4a001fe7ccc74ab0e0dc286e28a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with several pointing to compromised WordPress upload directories, suggesting it's used to redirect users to malicious sites. The presence of embedded JavaScript, though not fully detailed here, further supports its role as a malicious document, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=the+salvation+unmasked+pdf PDF link annotation
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/0jvvpb5dpq8sbr5ecm7t71l1a3/xovatidipo.pdfIn PDF document text
    • http://topas.lt/userfiles/file/jiwudeboreputaxefivones.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a074e52b9a---30277195580.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613406010dbd9---40842235027.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/26686521069.pdfIn PDF document text
    • https://ags-car.com/upload/files/gebixur.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/figebejuzukefiboxaw.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/letebil.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/wazuzipimulatexogorugebor.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/siwawuloxopanizeta.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/76906524564.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/99519342396.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/jovisulokofas.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/17508695717.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e3867c0e2---bilupejazugezapuge.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7dbc39f12---25815461984.pdfIn PDF document text
    • http://abwva.com/uploads/files/nerixetumufajigazisalugew.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/3ev37t0s7s8acbknti0o1a84q0/47832081684.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/mezosuwugefezof.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/xadara.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/60263135500.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/81340312726.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/96256826080.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/kirubi.pdfIn PDF document text
    • https://parkettworld.com/upload/files/zowakekekad.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_off0002dbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DBB2 10884 bytes
SHA-256: 0d05f8d7f26f7498d34756e672ce9dbd2220af084dc74af73d2419a9cced0ef8
font_01_sfnt_off0002f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00030ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CCC 19952 bytes
SHA-256: de48df56bb712eac99571d465475e47b4ea150143d19a1e98b514670fb25432b