Malicious PDF — malware analysis report

Static analysis result for SHA-256 007578ea3a0e9eb7…

MALICIOUS

PDF

72.7 KB Created: 2021-09-17 08:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2ac5b656434b113f414263f9b7dcf435 SHA-1: fa488e4743de4c42d0afd525b82d63bd56c12267 SHA-256: 007578ea3a0e9eb7540533f9e6b5ea3529cff32da3f36673c50148fecb80f7ca
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 are part of a link farm on 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 the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=ludo+ninja+old+version+apk PDF link annotation
    • http://eatoceanic.iorderfoods.com/uploads/files/larejoxotexinatota.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ac4522103---mipupefa.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/dulowamufewis.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/96974855625.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/41608777214.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/81456367057.pdfIn PDF document text
    • http://a-pluset.com/userfiles/vaxokaba.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d47655f4f5---gezekarojuzumolotabozoli.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/37639188026.pdfIn PDF document text
    • http://runhouchem.com/upload/files/92158328485.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210903_0F0D970F4C806BE6.pdfIn PDF document text
    • http://bdnchem.com/upload/files/wixesulusajelusiniguvol.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/11483713103.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/feparedigupesiv.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/81184092273.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/vewavoda.pdfIn PDF document text
    • http://runwellconsulting.com/file/file/nudovigotal.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/49070058183.pdfIn PDF document text
    • https://ordermorestuff.com/cmsCart/upload/file/3030976124.pdfIn PDF document text
    • https://macjiboter.macjahisa.si/files/file/laleretixefuvixe.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-11/20210911080114187307.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/67717686642.pdfIn PDF document text
    • https://inarsindbari.org/uploads/mobezalufiwurivedadem.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/momotukutoki.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/fimatuniwiwidakelibaxudu.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_off0000ba4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4B 10632 bytes
SHA-256: ca2d2cc7d7f230080a7a1c0e89d60d275176604937547ac814b265d3d76983fa
font_01_sfnt_off0000d2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AB 16712 bytes
SHA-256: 08c08e13aff1cff721d1b757981524dde4fd68adaf212ee906365be89ec95ee7
font_02_sfnt_off0000fcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1