Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d694c756fa98d13…

MALICIOUS

PDF

86.4 KB Created: 2021-09-19 23:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b4f452fe13c1e45f48b67505a0a684c2 SHA-1: 782c4b94727077eea711465594ba96a0ecd9d2c5 SHA-256: 8d694c756fa98d13c12f075529b3e199aec8651abb49014ee1956693142005e6
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits multiple indicators of malicious intent. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malware. The document also instructs the user to install a remote support tool and provides password instructions for an archive, a common tactic to hide malicious payloads from initial scanning. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://freeware-software-download.de/uploads/editor/file/kotevarijuxu.pdf In PDF document text
    • http://pozitron-s.ru/userfiles/file/virenilopimasetigudiboseg.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/23544353736.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/60215643132.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/91567241115.pdfIn PDF document text
    • http://land89.com/ckupload/files/89371172428.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/28182117430.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/jemujo.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/bubinesulabexekisekaf.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/gtg5bjg4vlhav8i1u124fjogrh/jemogajod.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/tumiwubetelusikigazoba.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/wiloguturasegob.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b8e70a0ee---52336193824.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/vurererodamijadepuwu.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/10971525191.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161405b83e6e5d---16082237741.pdfIn PDF document text
    • https://stopserv.ru/files/file/99707658837.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134a0a75fb6c---boretolaboxuz.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161468ca8bb775---47608008209.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/78697432159.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/95520124035.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/56159237936.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/zidobidavikowu.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/97769976947.pdfIn PDF document text
    • http://prosquash.by/data/95946139699.pdfIn PDF document text
    • http://devison-matras.ru/upload/file/42346008020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pokemon+x+and+y+emulator+macPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/13165331870.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_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10441 10680 bytes
SHA-256: 87c8f9fa0901d3993062ad083f3f2ae16bcc311ff99354e7dafc22097300c23f
font_02_sfnt_off00011ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCC 17880 bytes
SHA-256: f3beece13d2b53b5c579d90bc5fc13452f7f01d2dbbee89369df19e83cbbd6fe

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