Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9176225cc6dfe2b…

MALICIOUS

PDF

82.8 KB Created: 2021-09-19 21:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 86c32ee0fce0789662f5beaa70af1021 SHA-1: 083a7b50334fca6847c460fa4192c2e542a49354 SHA-256: e9176225cc6dfe2bf0a44cd4d2511ad7c01507ce2919709a8a717bd18f6ab460
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm that redirects to multiple external URLs, many hosted on compromised WordPress sites or disposable domains. The ML classifier strongly indicates malicious intent, likely to lure users to malicious content or phishing sites. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/4e7ee5238099eeec70d4706b45f6b8f8/jodotagurujiwolora.pdf In PDF document text
    • http://szyqjsj.com/UploadFile/file/20210913025331372.pdfIn PDF document text
    • http://kelt.pl/userfiles/file/94206238256.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16145286608aac---siligaxakatedotafut.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/jugadogalipetofifemoj.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/13806847062.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/nusate.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d93b4b50282974c98c4e4012f2208f2e/51099480842.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/sejazibuniwemuretolofami.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/23972211851.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///55980337989.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/77829954957.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/zigedezupuf.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/57874906299.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/xutovajirijuf.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/betosavafuveziromerofoxo.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/3708906078.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/jugivobig.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/33908197910.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/63167835171.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/49122359845.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/18919105156.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138651f98aae---7751556276.pdfIn PDF document text
    • http://temple.mo/userfiles/file/mukenurovafobavomile.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/vosolugonemedesikak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=video+morphing+apkPDF 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_off0000db4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4B 10588 bytes
SHA-256: 6565958c04ac7d33b9dd80f78c6feaff63356a98e434d21c5de78b02c5e5522f
font_01_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 19344 bytes
SHA-256: a3285ebcf048f2a5f03fc20320e3230b8cd4d7893c21ddf961e9c971a4d57a5b
font_02_sfnt_off0001257f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1