Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0cbf2a5383472b…

MALICIOUS

PDF

78.1 KB Created: 2021-08-03 11:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7b65fa0452a5a4cfad92c49dd6106531 SHA-1: b325a31931e59e0c547f8df194eff5b6d6d0353a SHA-256: 7e0cbf2a5383472b706c32517616e666fee580bc67a3263f8cbdedc396f2a205
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are associated with compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristics and URLs suggest an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9026

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aefc1cbe22f---22926674234.pdf In PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/eiubj3amt3qkm4qqt361nha27n/lejezakasem.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831b0a273a8---15822636982.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/69135522879.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/40702520779.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/59000260026.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/14802835112.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/lf9skf0473tisg1f957p23jdm2/97199235476.pdfIn PDF document text
    • http://e-sportis.com/images/upload/70361764558.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/mewabupu.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16079b2dbab725---tasokibo.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/mirujoz.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/zimozizo.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/48406601593.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/db5b8799a6dc39136e9f66572cfb4ad5/buxafugepewin.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/60930613564.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/0625afb02f9d07dfcbfd48dedb2f8d2b/jakewapovilonidepi.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/nofelezogatajerigerugite.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c71c21645a7---juwudasunen.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/lesufavuviwisuvag.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/72273158490.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a829b3947---wimigabagapuwa.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/cad9f53c275efcfe1c425db027a0d53c/29159280881.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/xefujaluwedetedobugilu.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092226e9a2c3---41988935774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=fox+news+primetime+lineup+tonightPDF 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_off000107a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBF 10804 bytes
SHA-256: 20c4fc09a76df32638f0853fe63215b1d0478a7dcc3e913f0c75165aa5f94a5d