Malicious PDF — malware analysis report

Static analysis result for SHA-256 9289ba07d6eff833…

MALICIOUS

PDF

77.9 KB Created: 2021-09-11 14:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e19bb9bda95c00911c60a3e8b4f62a8b SHA-1: b930e5920cbf8045ffd743f2196e3bb8c7d8ad1e SHA-256: 9289ba07d6eff833dfa200a66b502c8d54ef9ab69b43ea274c2af03a4956673d
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and links to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The file's structure and the presence of multiple links indicate an attempt to redirect users to malicious content hosted on various domains.

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://huntic.ru/uplcv?utm_term=android+windows+network+browser PDF link annotation
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/acf84833bbda8fab42fedd3bdcf1e210/viravapoze.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/rinikozilavewelikap.pdfIn PDF document text
    • http://texmet.pl/userimages/file/34083986831.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/73625177574.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/48310307397.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/12627764902.pdfIn PDF document text
    • http://jainfarms.com/uploads/duzilikagobemon.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/rapalomewebimulapu.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1fc26b986---11373532575.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/48130113144.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/bt59k86esgo3opldl8aho7dge5/16642454382.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/welutebuxogogu.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/tozajukibotukijexabovig.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/36792803318.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/nezafutubomurenodukoxidiz.pdfIn PDF document text
    • https://fuze-pay.com/ckfinder/userfiles/files/fubezewetepiwiti.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/sepanogutanolu.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/86548074709.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/30680039883.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/70868232995.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/sitokozoxanopetaz.pdfIn PDF document text
    • http://kunbot.com/upload/files/50819735304.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/528620160.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/tapewatimijipif.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_off0000cfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 10332 bytes
SHA-256: 5f103e54f9033d7fdce57bb46329a0b9baad0b15719eb3a0d134ca1c1b011bfc
font_02_sfnt_off0000ff4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 16564 bytes
SHA-256: 4cc8eb2a9f839e6febc782d8a43180080f5d23b68aa95cc66686402151e16585