Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26fbdb7f2a9334f…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 22:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c2f1d1e7736ce10c159ff6313b649d3a SHA-1: b6e1b492aa6976d1459fb0b01f62d587c2c8e391 SHA-256: e26fbdb7f2a9334fc9c3144c3137a18cd3967aa00add6c3196112bafbbccabbc
196 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document's content likely instructs the user to install or connect to remote support software. While no scripts were extracted, the PDF structure and embedded URLs suggest it is part of a phishing campaign, potentially leading to the installation of further malicious components or direct system compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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 http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161318f480438c---17576402920.pdf In PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/3928178157.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df89c02ccc---pojiresujutenelisuf.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lasonafari.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/23079091136.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/32407207640.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/56973133365.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/nikadepemufizekowin.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/piwovizidojebunal.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/88753383416.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/pupedojokadub.pdfIn PDF document text
    • https://ratodua.com/contents/files/doxaxozasoxutib.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161419f76268f6---dapawozakavesorages.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/volitikugov.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/69474694760.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/44971433563.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/10606319778.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/f0077b375c85c43f382718926bfea62c/95067602796.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/64459631856.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16145a6f85d0c2---pugokoseminazigelido.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=best+free+phone+app+for+android+tabletPDF 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_off0000da74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 10788 bytes
SHA-256: 0b7493332469155a57145f16cd31dc6558d813c749fa4cdb75a0f8fe81e135dd
font_02_sfnt_off00010b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0F 16892 bytes
SHA-256: 3fdf7120f6787112fd90d77d2df739fe5dec340b586e8395a3cfdc9f63af2426

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