Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeca54884adccf4…

MALICIOUS

PDF

82.5 KB Created: 2021-09-20 08:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 19c8ba5f3b6d4e8f8bb632a7ef1a30b1 SHA-1: 4182ac79b3b1c0fe47d4278992f817f15da75889 SHA-256: ebeca54884adccf4700db333d395b1ab9ec37303d2caa90997a06c63b7ac6cb8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to potentially compromised or disposable hosting. The presence of JavaScript and link farms suggests an attempt to redirect the user to malicious content or facilitate the download of further malware. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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
  • 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://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/51086920842.pdf In PDF document text
    • https://lajovisena.com/gallery/file/rabuvipifezizufekosajisif.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/midubaxowezabatemuvixero.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/69479112646.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/deziguxa.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/galulepilar.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/feledumemixujuk.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/58181373913.pdfIn PDF document text
    • https://panelshock.com/userfiles/file/23182983930.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/famakojomanudanowotare.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b64ec3c9eb---19386208170.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/xadizezanapagutaka.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/4a7v5dmp9omhid5squ4jjfn0e0/2101909614.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/88152339679.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210912_9CB4C803099EBBEC.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16133a8125324f---lifimunovizitapedixupowis.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/1276692266.pdfIn PDF document text
    • http://wlpp.net/images/blog/file/sagipexojefos.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/jatelesikedeforabeb.pdfIn PDF document text
    • https://kolkatanagariksammelan.org/ckfinder/userfiles/files/ponatinugezetabizubiselub.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/rokuvafirise.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/sawobadiwodoxujib.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/27370201789.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/zowujol.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/kodijesetuzizidifefojan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=dead+trigger+hack+downloadPDF 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_off0000da98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA98 19060 bytes
SHA-256: 5d0324f63f469ac4bda9b57f8d08a5752c3252f2a93906b3228f0be2c60ceb33
font_01_sfnt_off00010c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C24 10660 bytes
SHA-256: 6d03850ea850dd4060e9c46aa92a41cc2cccd0cefc4d978127c45948d79984ed
font_02_sfnt_off00012456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1