Malicious PDF — malware analysis report

Static analysis result for SHA-256 8824fe3d89a34d5b…

MALICIOUS

PDF

87.8 KB Created: 2021-07-28 14:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0c44dc1bbaf7b315a08f547a64d95c7f SHA-1: e3b52e15d4afd3c5859681b4b0ad30e7a9d17068 SHA-256: 8824fe3d89a34d5b6cbc3a30c8ae78d93f1d91f1fe26456c78163b85372ed25a
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5114

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 https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/dl7tri4e7tcrn72bll4m4hr53c/japupoxibusaki.pdf In PDF document text
    • http://industra.sk/userfiles/file/xuzoj.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/06a603e1079826495383e2ef93af8895/botupixarizak.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/46383821606.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/3b91addce9db5e1bbb30b47bd90a1d08/47372567742.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/37d54698ef9fb3a1740f0174e1ee594d/vafujazomidezobidudixo.pdfIn PDF document text
    • http://sns.hu/_user/file/11533474838.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/34ad6d5992ee22dcf7924f6a802f8da1/gexoxixumemozip.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/10160101862.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160876182c45bc---bofopuwaxarefewi.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/93667574639.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/49c677c447fa670a485b9f5b1348df38/vuvolutisevavojefonowafam.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609786cc014e1---gobezuvonaraganexodezefil.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/3d43126b279f215e84acccd753507cdc/rebuvipugajixoli.pdfIn PDF document text
    • http://alptw.com/images/files/97340930261.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/lofowo.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b4b2051ae2750734cd2406bcfeb64429/34602592334.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a77e2e41684---xopowegataxusiveg.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/87073968082.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/1ub2u8pk1bdaoaemucv2i8v9q0/romilufewoze.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aee8328579a---pakofezamigupepiji.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/88797607964.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a30ebd8ce6---58757140500.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e24a17a0f---33449887482.pdfIn PDF document text
    • https://ibextrail.com/editor-images/51660558301.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/14533787110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+makes+a+maritime+air+massPDF 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_off00011f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6D 17160 bytes
SHA-256: 6b6b9faf46dd32184430254f8130fe264f47b13215e437a989b149a5eb7f9c31
font_01_sfnt_off00014c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C52 10188 bytes
SHA-256: b03dcf029ab349be8e4717165f0332715c902eb013e309be48f5e84b36a26b86