Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4b49978d341062…

MALICIOUS

PDF

72.7 KB Created: 2021-09-13 23:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c0dcb3846179f7ec1842745d291c84b9 SHA-1: 14cc3d68e6af286571ec3806321883baa5627289 SHA-256: 9d4b49978d341062cda84dbe8a94595f6f2dd3ba3923dab20e5aeafc3503838f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing lure or a downloader for further payloads. The presence of embedded JavaScript (T1059.007) is a key indicator of malicious activity within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://d-innovation.com/upload/files/burixijixanapaluxetopoduz.pdf In PDF document text
    • https://episcopiaoradiei.ro/files/11150255020.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/dowiwitopujadejivasikoju.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/49124375282.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f71c4935d5---guxupezizeroxomejusazaf.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/revozerutemiliros.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/29081365082.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/taloxapeputepuxuzajefawu.pdfIn PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/68861222111.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bc0ac06e8---bijezebunizipizelesidux.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/50558040365.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/gosovato.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/23322359424.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/26194013573.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/3940002565.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/fojepinukerizexirapari.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/47181423999.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-3/20210903010916102596.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/pigurakojid.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/80553776785.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/37544720394.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/taxoxevagepi.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/pegixeniweguvamedob.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/bisulaxipemodefukamoxibad.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/40597527266.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ragnarok+mod+apk+offlinePDF 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_off0000baaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAF 10712 bytes
SHA-256: be9a450f760fd732dc1626fbed5cce727bd2a2532bffa49ba726c71d9a0b47c6
font_01_sfnt_off0000d2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 16328 bytes
SHA-256: 736c3ac96f81d232e8b725ef0e0a70fe2de8ff112652f5fbb45250747f326f7b