Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02d0f4610b236b5…

MALICIOUS

PDF

86.7 KB Created: 2021-09-19 08:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 14866efb21926a884ea42dbc64043ea5 SHA-1: 6f5ef5eeeb16ab5f709724513169e3388c96c339 SHA-256: d02d0f4610b236b59a99f96949a571ead2132539a706613d36d9a1155e107284
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://pixomot.ru/uplcv?utm_term=kitab+al+azif+arabic+pdf PDF link annotation
    • https://www.sterlingsez.com/ckfinder/userfiles/files/mivinoz.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/fogixutizevutiwokapifagi.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/70384016012.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/gumafojukopila.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/keruzeloluni.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/61478645090.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/96574416205.pdfIn PDF document text
    • https://ip-pharma.net/data/files/37328348717.pdfIn PDF document text
    • https://hockeymro.ca/docs/file/63484378297.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///rudazas.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161401aade370b---92813468307.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/14617815599.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/6077967026.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/vokof.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/55110456195.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/velid.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/maxoxalo.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/lobiwotezusurewe.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdcb283c49---dizuka.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/wuwatubuvuzomujur.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/30488806308.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/libuzasazusopixote.pdfIn PDF document text
    • https://eetravel.net/file/tuxetej.pdfIn PDF document text
    • 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_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 10280 bytes
SHA-256: a1a6b91130be8b9f4320db34d360f2c0a4ac9ab2d1d58becaa6ccdc1d809f24a
font_01_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 20444 bytes
SHA-256: 2f4bc9746b2b7d54a1ff4d39146d85b307318ba70df8c26ebc3bfc31c5543028
font_02_sfnt_off000134ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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