Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5019342e4f4830…

MALICIOUS

PDF

89.6 KB Created: 2021-08-01 17:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b4aa51c848672dabc0956b57b415f964 SHA-1: 952d4b43557c7f0a1743a0fde047cd7ef9f97cd3 SHA-256: ba5019342e4f4830f9540fbf795c6f160531101a50761f5c931cb55d06ed75fa
156 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness, supporting the phishing and link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://adasms.fr/userfiles/file/31848894348.pdf In PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/3f2e949cd67ba59b1d2dfc398c43d67b/gekawomevava.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d31c49c38a6---29984745277.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/49178273412.pdfIn PDF document text
    • https://datajournonepal.org/files/xugalaxelutexe.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/4f22c6aa7e628c9f078718113e632b0e/gawixivolokapari.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/67947efd9d01fbce3801a9a04cf56c2e/89341325911.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0465dd4a44---2116724938.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f69473d0e---senisirorifakanukad.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881a4d41dd3---fuxumuvoduvixupub.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbc8603c66---4242822261.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21940026214.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/bogegazexavejijofinek.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4471e9acf240d61142a81ac9eed993e5/zikutonajarepevazad.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abf9f7c1e58---23239843019.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/xekipixopunafalikememeguj.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/jjjed4nm66ogl4qtkg26gj5ass/mapeneriwutizakonofixazol.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/36561cf1ed14cced889eb25ff4f8fc0a/gemiserusewesa.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/17105232402.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/nixokek.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/80215576526.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16090df5a7b8b3---lerowedujowizugatud.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/jomomufotuvalumowukutox.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/49278445694.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/39cccc5785ce8e70faf2861c7b3a7d7c/wuvan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=just+cause+3+apk+data+modsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 17608 bytes
SHA-256: 3f289bcee88cd06659dfc7977a222559286647055d4c26e7ccdfca3e0968bbdc
font_01_sfnt_off000127e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E8 10688 bytes
SHA-256: 2bc8a43b36cf4aa08d37e1919c626d94400f0566abce2913ed312663fc839d9d
font_02_sfnt_off00014097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14097 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1