Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ec701be03e90fb…

MALICIOUS

PDF

68.2 KB Created: 2021-09-16 21:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4bcda171af3bc013024dd13d65fd958e SHA-1: 824f769e81bae85425881e92a4dcccca04ad5b8f SHA-256: a2ec701be03e90fb30bd62e488a8b24e7c1d6895e75abad2f9854710e654d9db
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://coretry.ru/uplcv?utm_term=darknet+android+download PDF link annotation
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/wazoru.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/diseresetago.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/redexotogozep.pdfIn PDF document text
    • http://shamayachts.com/upload/file/pemizisiberuwirojovifexo.pdfIn PDF document text
    • http://tano-cable.com/d/files/fitoxigo.pdfIn PDF document text
    • http://sunway.me/ROOT_PATHuploads/file/032035538745.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/kuzilatedixidilefa.pdfIn PDF document text
    • https://www.algeos.com/js/ckfinder/userfiles/files/6074301318.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3e469647f---nufurixexegifozosid.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/fukajabe.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/jusafumabuja.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/danipofitejiwejasixivolu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/d614lrnv1c6ukh465r0r8lgsvb/56000684092.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/90c8f7f222a2bb6c38a73e7fd3a72ee5/47317164531.pdfIn PDF document text
    • http://agro-partner.com/Image/files/21936482997.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/85140382327.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/feforopavamebolulo.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/74860875625.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/38894519558.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/garesomexero.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/lemupugo.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/wujedoxubi.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/suwos.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/76557237382.pdfIn PDF document text
    • 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_off0000afd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD5 14568 bytes
SHA-256: 52bfb513416494e375fc919ee4155935efe47b45941a4a02896ffea378b8df8b
font_01_sfnt_off0000d453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD453 10252 bytes
SHA-256: 57b6baf0be220d1fa52a6928cf3abec56a37229124505b7f8603da7090ad71ac
font_02_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.