Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0cc07c159f2df6…

MALICIOUS

PDF

84.8 KB Created: 2021-09-15 18:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5ea6d6fcc8041ec49f4c650833f0cb44 SHA-1: 9ceed77daf90e47ad9358fd54af8fc6f0aa4d19e SHA-256: 3e0cc07c159f2df681dece833946ab00bdc372722757d7b7b122d015e0f6151f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests links to compromised WordPress upload storage. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.solucionaesp.com/ckfinder/userfiles/files/dixakitakagopavivemibeni.pdf In PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/19202865225.pdfIn PDF document text
    • https://securitydm.com/slicice/file/59764133267.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/72319892285.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1613b10b47b4b5---89696731017.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/g2revi41ura66lcmtis4tefm6q/gadodematafawapimafokara.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/sogukupazumutefuni.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/wufaragog.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140830177db6---9557782480.pdfIn PDF document text
    • http://kes.org/upload/editor/files/38951918710.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/33710763204.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/kelusukol.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a97f8aef93c715cb0f213f8583f45036/99920025380.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/62274854464.pdfIn PDF document text
    • https://abss.pt/userfiles/file/toxoxu.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/mofilipelopumim.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/020851386163.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/82900201155.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/67650980049.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/61157598693.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614111b440607---16079957842.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138f1d5d977e---nugabokisadamuwefugu.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/828c4f960811f858438ac0f224407b21/nonefatodopobozowafiw.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/23224084570.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/vovutagiti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=star+wars+pinball+androidPDF 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_off0000e822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE822 17336 bytes
SHA-256: 6160ff9511fd75dce7ba941153d0082b9f3f5615255660299dfd62cbe5131881
font_01_sfnt_off0001159f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159F 10552 bytes
SHA-256: aeb2fcfe98ca39ca71a8d149665f735a95e146c1c50f123a4c5cdbe7dc44a131
font_02_sfnt_off00012d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1