Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dabb618719a2a90…

MALICIOUS

PDF

56.7 KB Created: 2021-09-26 15:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4c4fbf61571d9d054423f1b4d097017c SHA-1: f6cb5d4dc0c82a27bdf07b11f2f457ee2f4a8062 SHA-256: 0dabb618719a2a9063187eaa4ea148b7439f083370198034955ecd398fec7f64
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is indicative of a link farm designed for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8138

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
  • 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
  • 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=full+romantic+movie+2020 PDF link annotation
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/6d6ba02ca87dc30d04f35a1c2342d0d3/79497724410.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/72543942214.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/23b55706f15cb58cf8762f952107d4d4/susak.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/nisibutojijivitiko.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/bilopipiju.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/fexixamubufenubara.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/56520122357.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/dafexopawudigebekukisox.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/tunorasu.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/tibawuwexexewodaniribiwix.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/wiluwomujopizad.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/to2ie26mk8nglmm00bkpt5mjhr/20360930583.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090413164473499.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/kawewopibazaxifupa.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/89784690416.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138aa11d7af4---vupukedezimado.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/60032365421.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/lokezuliranaxitovofize.pdfIn PDF document text
    • http://sro52.ru/uploads/files/90940803169.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/43659343417.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/mojazeni.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/bizoxamizubasuj.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/wopati.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353ce85205f---23999909228.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF79 14516 bytes
SHA-256: 45e1e08db15857eb3fe79747c093128349a4016bccab45ceb10569641dd711e8

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