Malicious PDF — malware analysis report

Static analysis result for SHA-256 a905ea635284c05e…

MALICIOUS

PDF

67.3 KB Created: 2021-09-21 21:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fc1659d6f5f3db255ccb5f0f0d20c6d8 SHA-1: 4c2a057f490aac0bc7bf27258b5a7e9d7ce566c7 SHA-256: a905ea635284c05e3ea9c3d8248cd586b9dbfefca5201328fed91738ca76937d
124 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous embedded URLs pointing to a link farm, indicating a likely attempt to redirect users to malicious sites. The PDF's structure and the presence of many distinct hosts with single links per host strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7965

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://superbarter.sk/media/file/22866129655.pdf In PDF document text
    • http://www.asiacoservice.com/file/files/94989728456.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/91856301746.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16147974f9d0f7---jofojasarazegovewulusa.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/savupodukuvez.pdfIn PDF document text
    • http://baove24h.org/upload/files/fafubedabogoredodosen.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210904203256.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/21532352200.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/ramipaxukogobiniropunuwo.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/sijirolobogujaxudemafalif.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/xerefewuselapekeboteto.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/javepepisetefafo.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/52600901433.pdfIn PDF document text
    • https://bfull.ru/uploads/files/16345116595.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/2707949860.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/silukozisomawezumoj.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/fijofiz.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/m49vkbns73iqb5khj5lt5aija4/45965627069.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/suxutevolerojepo.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/58066860256.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/51251104127.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/gelimitekuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=chrome+shortcut+keys+windowsPDF 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_off0000d72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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