Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46998ea7ebadf5c…

MALICIOUS

PDF

83.3 KB Created: 2021-09-18 02:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 731dec79172dbb1cdb4a161482503f51 SHA-1: 2cb9498dabd68725a8c06da416e753ad8c4652f3 SHA-256: e46998ea7ebadf5c129d648e727d26d567b080ffca4d0c76312b073b26a5d320
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, some of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external links suggests an attempt to redirect the user to malicious content, potentially exploiting the user's trust in document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/uplcv?utm_term=how+to+change+location+android+phone PDF link annotation
    • http://nemdanangpho.com/uploads/2021-09-10/images/files/medeza.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/vubogikijabupatobevovol.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/fd229ff8aea4b9a918ad947a1d2bbcff/ledisaxedunu.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/4437142490.pdfIn PDF document text
    • http://pedraferro.com/files/files/80478415489.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372c13eca74---fegixakolizawibojif.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353b25b2046---2858712959.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sapejogelinakowomepako.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea2e5e1882---wezixasowitawijenum.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/86426364151.pdfIn PDF document text
    • http://foodchemsino.com/d/files/ditiko.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210901154445.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/65604160418.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/118812403.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/68424724927.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/27408411176.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/vekivitomimisuxutus.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/13487970187.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/946458396.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/nekozebeminiw.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/sisoga.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/josetisasek.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_off0000de4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 10700 bytes
SHA-256: 69f1243852bb676c2359d992c414cd80e9c0d0a2ff4f5e124aaf795871670be7
font_02_sfnt_off00010ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA8 19188 bytes
SHA-256: 1c098ce7381828778bdf738fe78456b410e4d8939c5fb8edfb7eb0af9f11c1ec