Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e21cf9d3f19713…

MALICIOUS

PDF

80.4 KB Created: 2021-07-27 18:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4ffbd081d14428f8a6a94f89588bf851 SHA-1: 81297e0b88efcad7e70bc72f61fd8988d71119a2 SHA-256: c7e21cf9d3f19713b51a8dadcdc583f4610e467157fb8f1144c2a4540541d56b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, likely to distribute further malicious content. The primary goal appears to be luring users to download malicious PDFs from these compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9206

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://machinex-machines.com/UserFiles/File/89137255549.pdf In PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/ketugivifoforudi.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/fujarimetos.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/koguraxixudipixewipijom.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/633c95e5a63aa6a4788eb699361ee202/fivofaruliwewosifapile.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/tl06lgjaiij8kb1ufci6ua95l3/bipufafot.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/83208295484.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/tjktdarj0018c9svdld4mn6qc6/burivopam.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/0ac21bf2989897164ae55be5c987c35c/zijoxupuvanofugoxuxafufen.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/nimojadodemixibowuguvuze.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7628258c8---jukosajite.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/zititisesevimirivufar.pdfIn PDF document text
    • http://stonebreaker.at/jipebegazufugabeta.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/4cc24aad52204ae2ff8fde188efcf7b0/79363106823.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/rlrh0jqtae9q77ji9p4f7ccbgg/wuvemujulonejari.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/0b361b9434dc76647ead778ce59d9f3d/dojedetuxi.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/kuvujudisana.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d65e35f33c---79141442515.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768b280b849---nafapamatowivozuwapujitop.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/xawitup.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/21535250594.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=frontiers+of+electronic+commerce+pdf+downloadPDF link annotation
    • 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_off0001259f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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