Malicious PDF — malware analysis report

Static analysis result for SHA-256 000f477ac67f65d0…

MALICIOUS

PDF

65.1 KB Created: 2021-09-28 17:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 6a16ed9ee9d9a085d457a130084e2b9f SHA-1: 4924c0ef3a6059739a095da006286102e3a70e04 SHA-256: 000f477ac67f65d0dbd1a66f871e7af7d2cbc9812cb307ef082041af25d9bef0
124 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic identified it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5445

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 http://holidayservicemarsala.it/userfiles/files/2847505909.pdf In PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138dbb2dc789---wutixujipoluwi.pdfIn PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/jixezeguwanurefitur.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/loromokozofupabibigot.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/ganixeneribilokotenun.pdfIn PDF document text
    • https://stormester.no/files/file/mavawevapukoxivojuxeworu.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/12337467860.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/vurakuvamawaladomev.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/89923022886.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/44647175483.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/99427702090.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/e3d7c6413caf2e604bb57656450ef1ca/ritesepuf.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/robotuniruwi.pdfIn PDF document text
    • http://www.mattig-accounting.bg/fisiere/file/72577014302.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/tijidilem.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/82626058225.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/pimatebupifetaw.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/77497785813.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/kurigod.pdfIn PDF document text
    • https://funbugs.ie/files/file/27965906808.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/91411905933.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/6324881254.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/kesexivisulimefokenas.pdfIn PDF document text
    • https://22importexport.com/eimages/file/misifavujewoku.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/41638230787.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/mejexix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=unblocked+games+6969+slopePDF link annotation
    • 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_off0000b121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB121 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC933 15324 bytes
SHA-256: 7b50aa0f88562b686ae19054eea9ca8e708fda26a1ff2ee335c0fe59d9dd9df1
font_02_sfnt_off0000ef98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF98 11144 bytes
SHA-256: 4a1c5f512734279fa65d5e9b46f24119a285b85c5cffe70d826df187a7ceb6b0

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