Malicious PDF — malware analysis report

Static analysis result for SHA-256 2748d6f994c3d634…

MALICIOUS

PDF

83.1 KB Created: 2021-09-02 22:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: daf2b4cab18d82a905fc492ca5ae8530 SHA-1: 83bea4aa5be7d721b73eb59456e6334c2d091ac6 SHA-256: 2748d6f994c3d63455c2af95013c1ff53c5343735680f2c741a1f77dea615359
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. ClamAV identified this file as Pdf.Phishing.Trojan, indicating a phishing or trojan-like behavior. The presence of links to compromised CMS uploads suggests an attempt to host malicious content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/1687048419.pdf In PDF document text
    • https://yingzhaoliuart.com/upload/file/dokizovewer.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/o0m75gce92qrbq270v4u7hplk3/xefapuxiwutive.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d276634b4b---rikulatowukilotapa.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b3e736ae6---16328240758.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/witekopamikotabixun.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e3f2d98ca77cbf04c9f14d3251ee2b1d/wujeroresotesapugibo.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099cea6ad0c6---nanafusavidodo.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/98133189324.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lawopetasitek.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/dabelagilupivesujuxus.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/jawarenifuduju.pdfIn PDF document text
    • http://1976ahhs.com/clients/32223/File/jukematelobubi.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/aciv15qdg7hm7fsde745idi9jj/18222863600.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac68e88bf49---dumazerezanab.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/sefemopafiwetidub.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3617152f09196b3f59ef0605a96be971/sutikivizugodofimesa.pdfIn PDF document text
    • http://poiskvod.ru/images/file/51651513012.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/kukibo.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609de20fc32a8---rurosorun.pdfIn PDF document text
    • http://greenreunion.org/clients/f/fd/fd69eab1634eeea6368acebbe5d5cb0d/File/61387431837.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/pometufezo.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/84810326071.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/15348164591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=multiplication+worksheets+grade+5+math+drillsPDF 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_off0000f284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 11368 bytes
SHA-256: 8a507c2fa8aefff7f6d9001abf70a4a25ecfcb315aa2b2d83de85efb7b5813d2
font_01_sfnt_off00010d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12519 17420 bytes
SHA-256: 5d53e181f50fda9fd5321f3e13f5de99323cd51cc3669262425faf5ff984b430