Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf5e02509058f2c…

MALICIOUS

PDF

90.3 KB Created: 2021-09-09 12:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a226f675d953f5b413bdfb2ad5f659ef SHA-1: 204d6f2bc54b2874d971260cbe65dc5eee1ccf10 SHA-256: bbf5e02509058f2cc5627384369696d9f764b8e7dee3ab041b8c3632d4c4830b
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. The presence of these links suggests an intent to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://wastran.ru/uplcv?utm_term=fifa+2010+apk PDF link annotation
    • http://foto-recepty.sk/images/fotky/bapewisetivepusijanabore.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/rudururozo.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/gonidoro.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/9264fe07f5a251f605629a1617ab7e18/zatowoxuromazarofanoxawe.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/gexuwitafodoto.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161336178c4fc0---49960396261.pdfIn PDF document text
    • http://parateam.cz/file/lofajegubebeniw.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613760b9a6bc7---58361516755.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/tifujaveb.pdfIn PDF document text
    • https://grouptm2.com/contents/files/malurudig.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/82516473992.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/529928771.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/56663007245.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/gagakerumopomidiweko.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/9239334495.pdfIn PDF document text
    • https://akemi.ro/hirek/file/88486310605.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/regazidukikolewip.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/nepuxosewomado.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/34271620764.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/fidevukom.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/bokugidetamonaxafu.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/93690381194.pdfIn PDF document text
    • http://irths.com/upload_files/files/rafosokobuxe.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/70351460255.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/vutiz.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/13020132798.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 9944 bytes
SHA-256: a96ad7477c0c158bf1a5e55825ecfd5d5331a62c7e6171f741097e9da45dabec
font_01_sfnt_off000112aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 18980 bytes
SHA-256: 1589ee5694422bdd04549bea4d1560a2f10e826f83d4f50ff9d3c00282749a04
font_02_sfnt_off0001441b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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