Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f612d970f0dad64…

MALICIOUS

PDF

63.7 KB Created: 2021-09-21 10:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 04add60c584db55b1f1449949810df8a SHA-1: d8e4f73639a68fee758551a5e983f70d7520c96e SHA-256: 5f612d970f0dad643d44a26b51a0779a137bc3abc48b5d93d87ca169018f94ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm, a common technique used in phishing campaigns to redirect users to malicious websites. The PDF itself is likely a lure, with the primary malicious activity occurring on the external URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7270

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://drafthe.ru/uplcv?utm_term=instagram+full+screen+viewer PDF link annotation
    • http://woori-tour.kr/FileData/ckfinder/files/20210914_3B86D53DA99724EF.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/guruwikezugoxiburaxogi.pdfIn PDF document text
    • https://fong-cai.com/upload/files/fexakeremodemitixekesi.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/68934017292.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/93775512358.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/58b5b4085dc176754c86c54797c04cbd/nimurokevekonazovim.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/73961134766.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/33c0a3eb6eeae8c068f11558a751d7bd/kusanuki.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161411d03a902e---segerovoguvuve.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/dozekekomuduxub.pdfIn PDF document text
    • http://rinsacars.com/files/others/rewez.pdfIn PDF document text
    • http://email-database.info/userfiles/file/88419665545.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/xumezirizivot.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/72726367909.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109091700389791.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135d8eb2864b---kurebixikevulifasukazu.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/puxiwaregiru.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210914_023446.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/f4899870d01e628f184487faa66509d9/50101253709.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e845b10027---65400617916.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/zivudujipikukokisedeteg.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/mepobesubevul.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/vamixadiwuxumatedo.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/17752581716.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/netotogofutifoj.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC798 16980 bytes
SHA-256: fcc388fcab3146476aa165b487b103a762be76de92a0cf91daf3fd4f1c4bc262

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