Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62bbe692ad3ab29…

MALICIOUS

PDF

62.3 KB Created: 2021-09-24 03:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 69a0936d7107b9f77745db4981ab761c SHA-1: 8c923926d44a6f3c6574d03855444e48249f7ff0 SHA-256: f62bbe692ad3ab29eed1e8c4dfa4f7c27d6d7488817ba641c468dcc0b7e300eb
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The sample was flagged by ML classifiers and ClamAV as malicious, and it exhibits characteristics of a link farm, with numerous distinct hosts and URLs pointing to PDF files. The embedded JavaScript likely facilitates the redirection to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

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
  • 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
  • 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://mimpishio1bet.com/contents/files/55455663682.pdf In PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-7/20210907034605889575.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/96771094034.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/99875549171.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/zapezewa.pdfIn PDF document text
    • http://tayles.com/uploaded/61084009321.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/nuvemasilokofamodukuwis.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/mosabosositojexanoronosel.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///zalivov.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/juzojikokofaratasem.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/90329588180.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/17379946074.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/fupavaxebusa.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210911133829_4imr5w.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6575b4858---55948380294.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/75008248148.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/gaxoruzikekukopipaxu.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021091316055173499.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/85585368945.pdfIn PDF document text
    • http://vecsecity.info/editor_up/peduwunovabisedokixuji.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f90352abf7---sidoxudiwame.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/zumivupemebi.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/duzesa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=we+happy+restaurant+mod+apkPDF link annotation
    • 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_off0000bcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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