Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e276b03fa7a069…

MALICIOUS

PDF

91.3 KB Created: 2021-09-14 07:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b34a7d7836d1dc23b2e5f8b1712af8c8 SHA-1: 336df65474310da7e9a37e412968a53d4207a7c7 SHA-256: 29e276b03fa7a069ae28dccdac074dfc9b0e03e28800de23ac1d91e6a2dfa11c
134 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 PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm, suggesting a phishing or SEO poisoning campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • 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://vibestedu.com/_UploadFile/Images/file/talovimade.pdf In PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/96768085899.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/41749489298.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/sojezumoxuwek.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/48821438669.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/61503926449.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/kutizefotibivizoxufogo.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/68928826428.pdfIn PDF document text
    • http://umartravel.com/files/latemirigakimuwo.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/pofubewuzu.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/tiviresujanademavekerexi.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/felajudozagofekinid.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/80601542119.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/gugamojifusemokemop.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/613e64a90daea.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/61695122580.pdfIn PDF document text
    • http://besteva.com/upload/files/wasujolirawuxokote.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///73035632846.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161338247e8710---rukokodunenevobupato.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/xomilubonuzugav.pdfIn PDF document text
    • http://flexa.cz/docs/file/pipaxeketuzoxiviwek.pdfIn PDF document text
    • http://grossbuch.com/upload/file/kipokudotelejamuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=tamilrockers+hd+moviePDF 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_off000102fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 10556 bytes
SHA-256: 1bbafb7060b5cc88ab075b1ee033cff0f1c7748a73b68a1924025f3777709372
font_01_sfnt_off00011b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B04 17228 bytes
SHA-256: d215c3439890c3dbd7c8e79ad1ab18e70fccc1f8ded5a87ba6a99a8f8d3e1f17
font_02_sfnt_off000147b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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