Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99adbcf64c8c517…

MALICIOUS

PDF

65.6 KB Created: 2021-09-16 12:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 902f86b49b2248f719b8d7325e29b5ed SHA-1: b641ce8dd8765e62286692be075cdac1f1c56928 SHA-256: e99adbcf64c8c517b21b9db99edcb57ebe3bc538bc01f3250f965c964eef6a7f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to lure users to external sites. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6564

Heuristics 5

  • 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.
  • 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 http://verynailscm.com/user_img/file/fusagekolalodumifi.pdf In PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/fe35a085537ebda8f4911badf06e259b/simaduvugise.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/59140745764.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/6061373872.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/58615377406.pdfIn PDF document text
    • http://erpos.sk/data/files/20563180582.pdfIn PDF document text
    • http://vecsecity.info/editor_up/salusisisopimelomipadata.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/vabep.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/2i2elumdslp3pmd33d87074v85/zovupume.pdfIn PDF document text
    • https://nepalihemp.com/ckfinder/userfiles/files/botimelilugerebened.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136aa4d17e43---nekerakajile.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/kelalajavu.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/28490689513.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e9e45894f---jujezuxom.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/63061919720.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/9691297504.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/q58am9mnp9q3mmar5o63381hpk/besutusegorewirabase.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/xumidazozinovosipexixore.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/63552803260.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/25899283288.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/74034121740.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/55503675631.pdfIn PDF document text
    • http://hstechno.com/userData/ebizro_board/file/70193392530.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/linovigofivi.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/28054638353.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/cn2kub7ahpqtvueq2kk7o6j6l9/37864100496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ac+market+android+and+iosPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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