Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e282a3472fa749…

MALICIOUS

PDF

183.3 KB Created: 2021-09-11 07:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2130015945f7bd0f8094791cbd5fd2c4 SHA-1: a12db808cf533d1e6868d6f8a2fa25542387bf53 SHA-256: 58e282a3472fa7499dc9ce77eb4e7429cc043fa2f590a1ef2627a3b7eaf7e553
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised CMS upload storage, suggesting it's designed to redirect users to malicious sites. The embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9280

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://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161306ff89aa26---10898140918.pdf In PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/60198116297.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/93322190407.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210905215413.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132658803828---99212199385.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021911212482025.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dc9762a5a---16528032289.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/88943245656.pdfIn PDF document text
    • http://espwireless.net/uploads/file/74116678721.pdfIn PDF document text
    • http://chikatere.com/Upload/files/2317761368.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/21358180471.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20219215589527.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/gozof.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/17779221695.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/46629212393.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/fogunajowakifuvazolujogij.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/37591356391.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/3021288816.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/66118148473.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc7874ea17---56977584358.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/19128499363.pdfIn PDF document text
    • https://buyafranchise.org/files/files/vosemagemezunipexo.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/jajoxanolagufimuwurenewum.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/38399637742.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/73130958447.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/nebovumorevurinuveloloni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=5+letter+word+starting+with+gaPDF link annotation

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