Malicious PDF — malware analysis report

Static analysis result for SHA-256 85adb847f0199a51…

MALICIOUS

PDF

60.9 KB Created: 2021-09-28 04:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 13dd3ef2300406f839f2b3f5220dc466 SHA-1: 2071ccc990a90e28bffe82447da2ef069ac60638 SHA-256: 85adb847f0199a51170135afcdb62ad8729bcd906451750de3f9e206cb987be7
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. This behavior, combined with ClamAV and ML classifier detections, strongly suggests a phishing or malware distribution attempt. The file's primary function appears to be redirecting users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5156

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://vitajeans.com/ckfinder/userfiles/files/74333408263.pdf In PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/bipitepuzuwadediwolej.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/varawaje.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/sanowevixegopazozipelaju.pdfIn PDF document text
    • http://wwstationery.com/files/file/xewezufibuterujawevawaz.pdfIn PDF document text
    • http://fabtur.ru/upload/files/40679158834.pdfIn PDF document text
    • https://service-panev.com/userfiles/jofozupezeburozupaluwajit.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/dudomuxedes.pdfIn PDF document text
    • http://technocom.pl/editor/file/gobebuvuditaxuxegi.pdfIn PDF document text
    • http://mextro.de/upload/files/lomamafud.pdfIn PDF document text
    • https://thehealerspoint.in/admin/userfiles/file/98054110593.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/80788989613.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/89873776271.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/zoxoponodazuvaranok.pdfIn PDF document text
    • http://rakuteriyakicanogapark.com/uploads/files/wonumikuvugugek.pdfIn PDF document text
    • https://dhrc.in/userfiles/file/sabulonulekatukotidu.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/88271426467.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/lii2rohmia0rn9ruar278fdqt7/75846647312.pdfIn PDF document text
    • https://cargotavio.ru/files/file/kefiwozaver.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/vusajakokig.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/gujete.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/45295187877.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/39022896800.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/74040941183.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/10771500546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=deleted+pics+on+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F5 10508 bytes
SHA-256: 7652645dbcb3661d501f4c73e9ccb6fb15989f6414669aad70269ff7a7b2a008

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