Malicious PDF — malware analysis report

Static analysis result for SHA-256 68acd12e97c35ff3…

MALICIOUS

PDF

79.4 KB Created: 2021-09-18 19:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: aa86f26900ac06ad2d89701913686548 SHA-1: 19db99e503c8c934579a157151b0bd01d56b0726 SHA-256: 68acd12e97c35ff3bab5432daa9392611f9f0a7863f09cc2e48d3d91aea52e6d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The heuristics indicate it functions as a link farm and impersonates cloud document services to trick users into clicking embedded URLs. While no scripts were directly extracted, the nature of the PDF and its numerous external links suggest it is designed to redirect users to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://thefencedocumentary.com/adminfiles/file/57631751160.pdf In PDF document text
    • https://needletherapy.eu/upload/file/39031980643.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/lajopotude.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/ganewodototubasutid.pdfIn PDF document text
    • http://thepducphat.com/upload/files/saxaxujebegatisa.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/13324677368.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/gukerotusuvopuvapenexofif.pdfIn PDF document text
    • https://t2sc.me/userfiles/nopenurusozinaxiz.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/puwoxevumoxobarexobinu.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/26212202574.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53240300747.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5fee6b79b---70813356157.pdfIn PDF document text
    • https://ikomsolutions.com/admin/userfiles/file/30770938967.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381080b4e54---17016199815.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210903203418.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/9963767085.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/30386802730.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/xamiwofesop.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/jinulemow.pdfIn PDF document text
    • http://berbun.com/user_img/file/39487379506.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021090609501170554.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/62891280740.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/jatipedavumuxav.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/83634345584.pdfIn PDF document text
    • http://emaaravm.net/upload/files/3033605598.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/82462526032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sending+files+from+android+to+ipadPDF 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_off0000ce9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9F 10916 bytes
SHA-256: de34816de4e62aa0e14e3116703da454a8aa162fbf8dbba14247443c4f984ae7
font_01_sfnt_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 18744 bytes
SHA-256: e7f3387ea1c7760304a559166a29a2074e6f61406c7173d90d62dd64e77a7ea0