Malicious PDF — malware analysis report

Static analysis result for SHA-256 41065a1c430a8b4e…

MALICIOUS

PDF

70.3 KB Created: 2021-09-23 14:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2810ab61e6b26f28ac69085e02437d00 SHA-1: ee5a51ecacf4a7c6174df906ae1546eadefc672f SHA-256: 41065a1c430a8b4e3f9457e359a7f1c8838fcd6dc711801a1ecfc45fca6b8e09
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, suggesting a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3555

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://chcial.ru/uplcv?utm_term=phone+to+phone+remote+access PDF link annotation
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nakekorifanixavo.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210906111132.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/f2260330d48eeaac4f707df36afd3207/48160941061.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161455b3532303---jupuzewexonipuk.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/vopidumoxuk.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/88672333643.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/ralapa.pdfIn PDF document text
    • http://pinxedien.net/upload/files/surovofobusuwexefudu.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/11718203779.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/86734627547.pdfIn PDF document text
    • http://www.painters-restaurant.com/userfiles/file/95467847106.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/pewidilixem.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/vurizolanuturijevamute.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/jedudaduju.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1b52c1ae8---36027078362.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/zomomulekoxu.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/91324177715.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/kedusenurulirodabapubufa.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/dupudijevojenamet.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/vusizatesuz.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b48304b420---8021994509.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/pasivigo.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/biwaxewotinef.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/migotusav.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/fijoxejuvin.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/wujevomutulirilaxuzesix.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA12 18320 bytes
SHA-256: 9f66858527306160964cdcb8ff1e773714110b545dfd41d86c6521687a9a9fb0
font_01_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.