Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0fb4a29c1e5efc…

MALICIOUS

PDF

79.1 KB Created: 2021-09-12 11:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 055d96b232b541cf95ed964aaf6f74cf SHA-1: ed50cf3b960be507d0147aec375416c3896ed9a0 SHA-256: bd0fb4a29c1e5efc7cc765128df50155f937903df9c6e10bd3307ed38b81ce6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6185

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://synerhu.ru/uplcv?utm_term=is+rooting+your+phone+dangerous PDF link annotation
    • https://francemonde.news/UserFiles/file/22383150367.pdfIn PDF document text
    • http://wonderpanel.com/app/webroot/img/file/soliwoduxezasika.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/zagadijazijilolibis.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/ximijefexen.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///18440243627.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/peganuriwosawibeleg.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/sawekizawuxaza.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ebab5779e---45632190840.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/53188259474.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/jexef.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/4689663e01fd790ac5a0d684d0477a3d/lotakoveluzisexisedeto.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/bagepatitexelizes.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/lomuwotowegepavep.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8bc454bc6---gisuvefuwasavutavalafowen.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/witijowepizemib.pdfIn PDF document text
    • https://cplastik.net/data/cms/file/wavotuxudejogub.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/35246149916.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/8348466569.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/30301783351.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/43034750065.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/bitireviso.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/xumezirizivot.pdfIn PDF document text
    • http://jfe.hk/userfiles/xorakibepibotebelijaxolab.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/gapawo.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/vufilufudetedam.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_off00011717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11717 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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