Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3ba034949dbd2c…

MALICIOUS

PDF

51.6 KB Created: 2021-06-14 01:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 88676b70488aa31555b5058f160af2e5 SHA-1: a98ff34e24bd20ba7a4245f99b169c2b85ba7cb7 SHA-256: 5e3ba034949dbd2c1f1b046ba7e46fd8529eb324aae38435093785beb47db461
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links pointing to compromised websites, indicating a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to download further payloads or engage in phishing activities. No scripts were extracted, but the embedded URLs and link farm heuristics are sufficient to classify this as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7149

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://pistant.ru/uplcv?utm_term=more+concise+word+craze PDF link annotation
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c679249181a---27989995126.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/marezaxaseb.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3bf54a484---tigumiwamipepo.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b24c987104---51538664975.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16208477220707.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/17252815258.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/81c4c1c5bfae6bcfd92aee7b6af78afd/80229481670.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/69123988586.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/15090451613.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4342758faa---dogekata.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/5q4bbgpksommkc1nu2bngkpts7/sovakigajew.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aca684bbc70---62535021168.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7acfabbb5---dasedesopalati.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/842ecc38912a358fedcea30694775f22/13208920567.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57ebeb630b---rezupenolokigokagerexi.pdfIn PDF document text

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