Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b0708146eeeaac…

MALICIOUS

PDF

54.6 KB Created: 2021-09-19 08:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4952718fcf670e0f63ad714a9e6690d2 SHA-1: 29a7985bad4fa82a8f66d53538c06cf349a4774f SHA-256: f7b0708146eeeaacd6c934c6e074513809a633835f93a1e3f95969719fbdb3bb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. Several heuristics indicate the PDF functions as a link farm, directing users to compromised WordPress uploads and disposable hosting sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8456

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://aviapartner.biz/js/ckfinder/userfiles/files/66656682621.pdf In PDF document text
    • http://achwvs.love-mrt.com/upload/files/2450135716.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab0f78793c---samenetarinofuxitenesigov.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16131b2f16c4a2---xajozupujidov.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140c5cad5961---fisoj.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/33889413361.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/90332209945.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614072f9609ab---sazadedepenegu.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/mirenegebugaxesujax.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/13395596870.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/poluj.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/miseso.pdfIn PDF document text
    • http://osayit.com/images/file/59440045721.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/36825566329.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/81190200566.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/31239980153.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/11554078737.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210901042809.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/66711529883.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/55539804085.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/3b8b3f51442fc107d42f695eee79e0ee/85026769311.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/55415260040.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/96435480069.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/0301e2f26f382fa88079aa6af78316a1/81193708725.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=watch+star+trek+original+series+online+free+putlockersPDF link annotation

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