Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebb6dc19da3cea1…

MALICIOUS

PDF

76.2 KB Created: 2021-09-20 02:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: be1e3661e5db2c36bd3a66f15f975d94 SHA-1: 4f042c62a4d6fcfa607397a3979ae35a486ff81f SHA-256: 9ebb6dc19da3cea14f0b456d3c57b74483d048062a1968ed2abafc6d912a8906
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and the heuristic identifying it as a link farm on disposable hosting strongly suggest a malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.1709

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://queure.ru/uplcv?utm_term=pinched+nerve+in+shoulder+and+arm PDF link annotation
    • http://cleanking.net/userData/board/file/xipigigozuwudineboje.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/85523237155.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/23449614624.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/gunonimokudonubep.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/24916596715.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/88225941905.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/88098455476.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/66260024274.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/posumiwegubatukebusuledu.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210904200537.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/zitadurixumiviwadi.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613747e594059---rexevidugixoponobuxotegut.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/163064914195813279.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/suxugurefibomebibevutofi.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/62007164951.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/20559879410.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/99323616398.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/meximerelefopo.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/26005356341.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/36478244802.pdfIn PDF document text
    • http://xn--hazrdner-r4a10d.com/alisveris/yollanan_resimler/file/pevoxarulebironema.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/20426400899.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/sekij.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/kijowamopufudunukedu.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/jonunotozedom.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/fodamamanimadavijij.pdfIn 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_off0000d4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 10704 bytes
SHA-256: ecd8f66cf8b1a8b7b94582362f38d0771b75ca713713adf1cb358c05cc2aa1a2
font_02_sfnt_off0001052c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 16704 bytes
SHA-256: 87f272f01d42c0fd478f277d21410b414abee577a444ec610f8a2e3e4ba31dbc

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