Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bc45f3885a2fce…

MALICIOUS

PDF

52.6 KB Created: 2021-09-26 00:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 72fbf0fa30d3415d05226e9f5a533b92 SHA-1: 8a02792f9456175b89f5cdc18c76879fafe96e74 SHA-256: e6bc45f3885a2fcea5be7d38e90be6360eae038e5f0002fb534e6b1f886e0aae
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8840

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://santa.sg/images/users/00000000/files/37357030139.pdf In PDF document text
    • https://hizlipin.com/calisma2/files/uploads/6927211831.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/21888080491.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/fafokinupejiforuluvifas.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/9415851129.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/69f082ad01a489463a1169e641f1cefd/35483932586.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/ec56439595236c00315639d88792841f/57489404667.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/wurijakoxewefekirone.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/jaziv.pdfIn PDF document text
    • http://newo.ru/files/files/boferomopadedaj.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/jizufurunatudijilixig.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/26046237995.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/72885723451.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/66055292275.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/54598527960.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/nesupalufifodovuwedel.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210920_C2F5972E9019A26C.pdfIn PDF document text
    • http://geoman.cz/data/file/pupijoxoxi.pdfIn PDF document text
    • https://hoongnau.com/upload/files/jizipotubavudadodebebin.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/76272328484.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sincronizar+contatos+do+hotmail+no+androidPDF 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_off0000bc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2A 10640 bytes
SHA-256: 3df90e5578c0d58a41a545dd822626cad809f318ed0620f90da8747ffac66dc1

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