Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d211d0b1bcdca17…

MALICIOUS

PDF

85.1 KB Created: 2021-09-22 09:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c38059aaec631c32167bb74d23e23c17 SHA-1: 297bdd072a98123f0c98f6d6bb3e285bb896fc73 SHA-256: 2d211d0b1bcdca178a22512735d8b3eda01066aad07e973028007500e2dd7eca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external URLs, which are characteristic of phishing or malware distribution schemes.

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.
  • 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
  • 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://pistant.ru/uplcv?utm_term=house+of+payne+watch+online
    • http://stevis.cz/files/file/vipozazupidibo.pdf
    • http://hkbroadwin.com/userfiles/kesosojatixefoze.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131703a80e84---gopelos.pdf
    • https://pr-dienst.ch/file/fawapilotizi.pdf
    • http://tomboy2.com/images/library/File/puretegidabolaguzazu.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613c44dd6064b---28479158251.pdf
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/19680052205.pdf
    • https://best-label.com/upload/files/14363064550.pdf
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/zilopuzazamamadogek.pdf
    • http://myxroad.net/upload/userfiles/file///nalopofisawakiw.pdf
    • http://doctour.hu/uploads/ckfinder/userfiles/files/79122240332.pdf
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210915055953.pdf
    • http://federicozucchettiarchitetto.eu/userfiles/files/31965130782.pdf
    • http://agriturismolionsfarm.it/userfiles/files/seluwewukusomimezoluti.pdf
    • http://gamax-moto.cz/data/dokumenty/85135129344.pdf
    • https://mbamantra.com/ci/userfiles/files/76264294289.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16141adef1515f---foxumowuxu.pdf
    • http://novelinternationalschool.com/ckfinder/userfiles/files/lasajenikerisugifinenoxi.pdf
    • http://bisenzia.it/userfiles/files/xujuneforijobavitibiwew.pdf
    • http://millecolori.it/images/file/99569244733.pdf
    • https://agriplan-rs.com/dados/ckfinder/files/gukakivekirupunufegosinod.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0n7vh489n7m1eh3gbeui4vom23/fazedade.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161341b2e20454---40659558924.pdf
    • https://artinterior.bg/userfiles/file/noguzimamedonafu.pdf
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/59874027645.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e758.bin
9645894ebae6690660f4add3bfc46b69765da655e3284ce914a895cbe95c8e1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 17824 bytes
font_01_sfnt_off000115c1.bin
39ac37e6e00ac5a02c4b08e67b41623b1df0b21123443598f7202b1764c459ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x115C1 10768 bytes
font_02_sfnt_off00012e91.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E91 16792 bytes