Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93e96035ddedb33…

MALICIOUS

PDF

62.5 KB Created: 2021-09-29 02:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96c26262eb4f5885a4d1147aa699927b SHA-1: 08b59420a1e3b8f8d33a9d2c9e9dc5c0b9cdd046 SHA-256: f93e96035ddedb3340e03684692627ba66df682827e76f980ab3e0888fbbaac2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier further indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5920

Heuristics 6

  • 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
  • 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://pixomot.ru/uplcv?utm_term=import+pdf+to+corel+draw PDF link annotation
    • https://rh-h1tapi-turbo.com/contents/files/vugajok.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109020048108130.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/6020178158.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/iqa0kjim3qeha6hk871akj4kl7/34722200118.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/66048890631.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/jolivupasogomanokeweru.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/161493c5512f6d---93878419149.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/55832352474.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/mofawadogiret.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/nanawatubewepiximoviput.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/fegomokarezozaj.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614efaace3d1a---4417833219.pdfIn PDF document text
    • https://alley.52886.tw/uploads/files/66472226352.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/fe0390d67d0511edb55d52e6a522d172/jonivubiwotedu.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/piguxewogasedi.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/dalelazodilowunefi.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d75deb5fc8---navujonobovo.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/85352279992.pdfIn PDF document text
    • https://yasacompany.com/upload/files/11105992445.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d3d7cf7b735a7aaf8b988c435813460e/16138538876.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/vivatunudisawadudonajobof.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/17644251042.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB092 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A4 16896 bytes
SHA-256: 1f3d9c701c0170340ff1e31690ba0f622358cdb7f022ab4f15e035228ae42341

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