Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f24b6ee0e1d6bf…

MALICIOUS

PDF

72.1 KB Created: 2021-09-12 23:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0ce423ea53c8eacef215c47cdf485962 SHA-1: 53ceae8480b088ed01aaee75798f75876c9305e1 SHA-256: a0f24b6ee0e1d6bf177966c3e00665f140fbc5c7d6ccf5c8694a2c71ada66b0f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF identified as malicious by ML classifiers and ClamAV, with a high heuristic score for being a link farm. It contains numerous embedded URLs pointing to other PDF files, suggesting a tactic to manipulate search engine results or distribute further malicious content. The presence of external URIs and the link farm heuristic indicate a likely attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7780

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wineuniverse.us/userfiles/file/nofun.pdf In PDF document text
    • https://gornjastubica.hr/files/10559726359.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fadowija.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/binugo.pdfIn PDF document text
    • http://inercial.es/uploads/files/totumijefedamufenokig.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/runimoka.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/73528027715.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/vunawuganisevijoxibetej.pdfIn PDF document text
    • https://nasco-ye.com/uploads/file/42371237996.pdfIn PDF document text
    • http://nhabe.com.vn/ckfinder/userfiles/files/kuvikemaf.pdfIn PDF document text
    • http://ternovykh.ru/content/file/dolosavejabukap.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/vozeguzivanovo.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/83222974700.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/wujusi.pdfIn PDF document text
    • http://stattus.com/assets/file/4493868987.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/nezofasoxujifafonurodegu.pdfIn PDF document text
    • http://cartopack.be/Images/file/51933566362.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/23029814283.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/87124088187.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/161398f4c9df01---86655073697.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/zifimefudosexuraribib.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/sudosoxawadoloduremo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=word+app+for+android+phonePDF link annotation
    • 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_off0000eeff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 17844 bytes
SHA-256: f0a9851ce473994d78a4c8d35329f78e9360b742e466b6ffdc24c611b6417947

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