Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebda42a0341a0c9…

MALICIOUS

PDF

74.0 KB Created: 2021-09-23 11:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7a9d8e069a55f2ced35c4481e383525f SHA-1: c6df7477aeda23b049cab3ce366903a718ca3899 SHA-256: bebda42a0341a0c94c99d8bfb166ed3381ccf07bd0cf86fde51cecb772c5c34c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • 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://coretry.ru/uplcv?utm_term=harry+potter+free+streaming+movies PDF link annotation
    • https://silky.ae/images/bulk_images/files/65067922203.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/1287970549.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/tateborawuxuzivurakomo.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/21903307754.pdfIn PDF document text
    • http://allier-genealogie.org/File:/91864344912.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/161456f7301849---garumana.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/pasusujed.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/wolivipukiwusezo.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/18595226977.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/doludupedaviviwijawalope.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021092314445574946.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/11179849562.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/nasusexad.pdfIn PDF document text
    • https://ratodua.com/contents/files/sixur.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/rubivezo.pdfIn PDF document text
    • https://melz-feu.ru/upload/49251358074.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/tumoxufonokejel.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/gepisobanugatukeni.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/jisitasojezub.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/zazuwip.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/3843392498.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/961efad9c4c10bdf7ee46ac03c749ce3/66792606027.pdfIn PDF document text
    • https://avukatwebsitesi.cicasoft.com/upload/files/zunurobeseromegivemub.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_off0000bdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDA 17000 bytes
SHA-256: 53ea1b67b7cc660764845935306f56e3190dbd29c289aba7817bf468c917ea93
font_01_sfnt_off0000e9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 10824 bytes
SHA-256: 855e1aa79e98c3603ae3d14f5b079d74758483155d79bbbb5d0fa344d1fd7746