Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3c602f4e182822…

MALICIOUS

PDF

65.1 KB Created: 2021-09-01 01:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fbc189ada805a58316847d6921c6a1e5 SHA-1: 84bb8f4a5d549f6c1988dd8fb46bb190acb05385 SHA-256: 6a3c602f4e182822a55c1cfc342eb8fd560868cde1e0d5cfd0ae71bbd3e3f907
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. The document body is unreadable, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7025

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=download+free+software+for+word+to+pdf+converter PDF link annotation
    • http://studiotecnicoarduini.eu/userfiles/files/kemudifelamozopojidote.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/pezawujikaweliko.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/jopugekaxepovoxujodasalo.pdfIn PDF document text
    • http://techbis.pl/files/file/45841600277.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1a4e3a45fc---10551386533.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/40723679269.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb5b044ffa---remewirabebosokajipimuxa.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/88499820974.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/e76e2858b480ae880952d2ea509689e3/98155451492.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/motojanibema.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/mavesepatowub.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a40b0f65573---sirob.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106811137ba5---zovononamutaz.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b7e48232a---merupudapiz.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb6c7b91dc---9886914481.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202108071345177283.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/52788026975.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/41227064541.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160787fa587274---wuluwuxakaj.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/45669296916.pdfIn PDF document text
    • https://zzarosiscarampola.it/file/wemupovojoxopup.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/98005290812.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5390d1ab68---lidurewezamekapumobap.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/d828dfca85fd225cfda19c61071aa6ac/suzuwomalisozavi.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_off0000d0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FB 17796 bytes
SHA-256: cd87dda69cde1e19bac8de5b44df193997f2568077736fedb35365654f3581ba

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