Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5cc0d9583a89a4…

MALICIOUS

PDF

79.5 KB Created: 2021-09-05 09:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fe19f18aedf226db6f9235e350673e4d SHA-1: 94e9714b78e77d277005d2c5d536d245d5e7e89e SHA-256: df5cc0d9583a89a40a53cc72aba811634ca06befd93ca726d9a6961ba2657236
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, likely intended to trick the user into downloading a password-protected archive. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document provides password instructions for an archive, a common tactic to bypass gateway scanning. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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
  • 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 https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d0d29c50f1e0f05a639617899de83975/29524624496.pdf In PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612aa2c380842---pijaloripunozududobeg.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3139401816---rinukigokaduzisogesakuneb.pdfIn PDF document text
    • http://canadanur.com/resimler/files/sofutulavaputepuken.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/23733d6efeab5157d17b15f9a8b70b55/70433658055.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ggonkr9jqnjjkimj1i952b0idp/38614123466.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/7070367313.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/73860889a5333ee28b6a99da1909c12c/kivewunejetitu.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/jeroluxowifitujulepozezi.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/43195439529.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/8813347550.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/823e5e1e552dc3d16fe798c458a31a6f/pivejevuwezoxudizubarika.pdfIn PDF document text
    • http://sakem.org/userfiles/files/futatikibevuwaneneleb.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/0ec8fe94e66bba6e143c8250a6f9da04/xodav.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b81e7ff2f17---pipunitokulorix.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6c5101eea341b61a29336b7f56129d30/65805433479.pdfIn PDF document text
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/37993053604.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/94515152434.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/05329929a69702d1abb957a161f33b25/78922367529.pdfIn PDF document text
    • https://ags-car.com/upload/files/gakadigofamitigivemamufaz.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/pelewuluvipapi.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/jokulosa.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/welatepevowusifakir.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/07/file/74695420705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=email+archiver+pro+manualPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/6303e3772a78e027dcc509df78c6bdee/32859104479.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_off0000ceab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C2 10524 bytes
SHA-256: e8fde82c5a3acab41707c9ad9a7d8eb5fdbc705ee44487a1c3b728fda45f7b7e
font_02_sfnt_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 19380 bytes
SHA-256: c71f583da52beb613ad7a985914c9a464d69228ef9424701bb54dce6bf2110f2