Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ad03c1e3ca393a…

MALICIOUS

PDF

39.4 KB Created: 2021-06-11 12:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 79062ca792df3ee0fc3e4bf42fe0ea54 SHA-1: 2e61aaa583761517807730918ccff1923179599d SHA-256: 37ad03c1e3ca393abf45f647320c7bc9ea6662d826bd94c557c11a02aceedbdf
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7882

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://cructi.ru/uplcv?utm_term=aimbot+script+any+game PDF link annotation
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160817bf6f2f68---36057745309.pdfIn PDF document text
    • http://schokobrunnen.com/idata/solesimibazedabofu.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aae08aa7c---kejezajuki.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/lojizegisuxetit.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4af2bd6949---losonadowem.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070e8f395252---surewisuwomiruredaseleda.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/907b38f86623f8f5d4a3656219b0812e/gixomuwajogajuv.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/66699278054.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/5393dbbd3eb66d573dd5ab35bc22c2c9/65347016216.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3a639c367---papubisivulizokemir.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608d348ab6c1c---limodofisitesawopu.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/6888121546.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/mizugoju.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/f831191ff1b91d5dbd51c1054cf8d1d1/9165124149.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/232ee4c2273d5183c3adc8d4cc8412a4/zewumefozekurise.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/sizipol.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609982fa50af9---woxuwagisitalu.pdfIn PDF document text

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