Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad9fb3c1b94ed3a…

MALICIOUS

PDF

81.0 KB Created: 2021-09-11 08:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 249a944d2ff21d24d13ffdb279a17941 SHA-1: 410ca8032805223f751a1de5ee1880072f22f8fe SHA-256: 9ad9fb3c1b94ed3aeeaa9ed6dcd3c2478797d4f0e9621a1569cfb844560714aa
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating phishing or trojan activity. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attack pattern involving redirection to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://emachn.com/data/attachment/file/dubezokejebon.pdf In PDF document text
    • http://sintjorisparochie.nl/userfiles/file/10352633407.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210907223706.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c76daff2---zuwuw.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/selemuxuja.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/tigemozifitefuditofewefes.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/luzazuzepodekituxe.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/futuk.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/dokebekuketebemazexibanep.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/nususujulozetejeger.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/56697613686.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/86328292921.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/84715203394.pdfIn PDF document text
    • https://promise-land.com/upload/file/moxisibavepawilivujizogu.pdfIn PDF document text
    • http://klinok-saintp.ru/files/15005361782.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/xulalapojosawedi.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/firebezuxufavarofale.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1594316cb---79818104001.pdfIn PDF document text
    • https://premiersuli.hu/files/files/55240820488.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/19391593806.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/wujetupafawex.pdfIn PDF document text
    • http://rayer.cn/d/files/vujisometolanolimewaji.pdfIn PDF document text
    • http://kasargod.net/uploads/file/29217880707.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/83376332276.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/91583161636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=pyramid+solitaire+mod+apkPDF 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_off0000cdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBA 10656 bytes
SHA-256: a5789770fecfb0ed87eacbf3360ea9fac2d69aca791244c49ebe63cd44ad1448
font_01_sfnt_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 21288 bytes
SHA-256: 20cafc2137a6ba36862ddab9be743549de4e404d93f2e5804002f4b2c8567ca7
font_02_sfnt_off00011e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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