Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2d26e12f429646…

MALICIOUS

PDF

91.6 KB Created: 2021-09-13 18:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 99fd606d90cf0dfce2a16cbab63e6c80 SHA-1: 82e4ba82ec9d1ef6a79c6d0a5e9575903d23d0f2 SHA-256: eb2d26e12f42964636168285a98caa3585aaf76828da870794000b4796aa36d8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing unwanted software. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=all+video+downloader+app+which+country PDF link annotation
    • http://ascensionchina.com/userfiles/file/vuxawegofidanixonowad.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/xanotodokakikemomev.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109131321217813.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613160790b87a---xasuvekizekoderagoma.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/bozidupitaputosar.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/mijupepasavato.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/59923638573.pdfIn PDF document text
    • https://kaparatt.com/images/File/farobufu.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/09b309a9fcc15ee5a9ef5d26dfeca194/74543471273.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/32977795539.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/40532795279.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pusomifupujemesukepitisa.pdfIn PDF document text
    • https://zemtechnika.lt/public/site/0files/rusojeborifasokoletimuk.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/rudegosageledofudub.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/nijirolovavavidotaxedugaf.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/53386265273.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163139930264.pdfIn PDF document text
    • http://kbfrutos.sk/images/_file/91581984856.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/kutunemesivo.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/41793718300.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/91755951309.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/nolozililuzud.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/54271697989.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210912_130830.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/26462609333.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/fidejit.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_off0000feff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFF 18860 bytes
SHA-256: 7b7c59ae0dc26e0c613ee0ac240dee0c2d6e68246ee7bbcd7e54a45650400065
font_01_sfnt_off00012f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2E 10788 bytes
SHA-256: 63a85343d2be0cf45138f4efe8f0c1d298e40e9f456d252283f268a51d8cfeda
font_02_sfnt_off0001480c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1