Malicious PDF — malware analysis report

Static analysis result for SHA-256 30098dff6821b41a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-20 17:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bd85b55f35c84059cc02652721b93153 SHA-1: a1c2d11c63a44ad8af756d17ed9445c592bec34a SHA-256: 30098dff6821b41ad2a1baf5b87c1c09d0c2b5ee023ee73eee5623e056f66539
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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.
  • 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://beeshark.ro/app/webroot/files/userfiles/files/vuganidesizaresafabeleko.pdf In PDF document text
    • http://tornyanggrace.com/upload/file/55600669991.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9ba167c38---xujotejosadelepete.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/muxokamumisusafefo.pdfIn PDF document text
    • https://avenue102.com/uploads/file/pefinelululin.pdfIn PDF document text
    • http://imbirimbir.ru/files/96166038877.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/detuxoliwasawadili.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/48869686419.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/22560849743.pdfIn PDF document text
    • http://vpsystem.com/files/fck/75208008068.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/buzaxabelumuwojolalureba.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/71289047399.pdfIn PDF document text
    • https://costarica4d.com/contents/files/46445036962.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16148093aed0f7---17715814488.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109161103262471.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/misusugijabimo.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/25743473088.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16147d6f54c145---kuvuxiv.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/46378905657.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/fikifarevelezadurilosetu.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/3f4qna8g5epae566hgb43bglmu/18181877187.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/73200494748.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/70866264863.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134f9840097a---riditi.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/nebubonawotiwofewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=fatal+frame+ppssppPDF link annotation
    • 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_off0000f88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001109d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 20564 bytes
SHA-256: 14e7fec32fbeab7e83a4fd5502580dec5618e6886a51e306ca44def85644a60c

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