Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded2b57591502b87…

MALICIOUS

PDF

63.6 KB Created: 2021-09-17 10:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f0b2338d98ce14aced37ba85e36f17c SHA-1: 40cf57a3b57c6674e59192ee96bbc0813e9ebd35 SHA-256: ded2b57591502b8753f486a5f1ba15f5a8fc2c24402e8fcaad77d98332e68215
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, and the presence of external URIs suggests an attempt to redirect the user to potentially malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the overall structure point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8429

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://ms1oke.com/contents/files/38167375117.pdf In PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/jezosu.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/45252298327.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/23610690415.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/38962912160.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161420c2537424---55166461041.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/28094335837.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/duxinugifuwazujarezod.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/savized.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/50157318821.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/34960827873.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/81154236751.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/bokeduk.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/taretujekufedatujede.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109100044583857.pdfIn PDF document text
    • http://aimic.com/userfiles/file/damiwunepulureserarura.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/77006231212.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/damagani.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/disukedunifamipe.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/fc9b6c0bb4aebb526170531d5a045543/bijuwupilazulikepivuxonuz.pdfIn PDF document text
    • http://ketex.com/trcgp/ckfinder/userfiles/files/jelatoxuzevub.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210917074658.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=ps+touch+apk+for+android+11PDF 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_off0000cdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD7 19156 bytes
SHA-256: 03c8182707653880f4919ff36ad79afc32242cb926438c288fafa61b8ce78855

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