Malicious PDF — malware analysis report

Static analysis result for SHA-256 7281d3c7c87c992b…

MALICIOUS

PDF

64.0 KB Created: 2021-08-23 16:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 41dac6ec961a7ddca25e96925997a88e SHA-1: 047a1702eb768183be1f43bab730620b5e569d2f SHA-256: 7281d3c7c87c992b220ffc36eb2a82428d931fe930a8ad126b29d32c73663760
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 WordPress upload directories or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9087

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://www.truca-taoules.com//ckfinder/userfiles/files/89748132331.pdf In PDF document text
    • http://ubest.ru/images/file/33827834774.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/6257b9197bc2258bc42d910ed02bff5d/3899252147.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/penifulowolusuviworufavev.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/j0m6486lsjmsfh82krh1n1j38c/39039503413.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/boxezuwitoletados.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/98711889123.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/i9f2f3vn9gbpp5skh6h87828al/xudamekebele.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/lovugalinerilirojerozem.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/83273889375.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d61bdacd435c6b6204da6ab8aa2fde0f/fikexeberexez.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/45792824001.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/9253d5d91af677784efce54c9841fd6d/tokexolufivipiguvubub.pdfIn PDF document text
    • http://hkacca.com/userfiles/nomelidi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c542cec3d---60693477564.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c1ee1159e5c01d24327133306c91983/24728606157.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/20895902824.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/87562482113.pdfIn PDF document text
    • https://sapporopools.com/contents//files/88626377398.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b9b0c6c48---rerubezupipeni.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/suzebawefesibogij.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/60947685888.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/ccdc277699f379e4e9af08ece783f3d3/26053454524.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/17859968319.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/motevugoxigitif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+the+formula+for+the+oxide+ionPDF 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_off0000d90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90D 10816 bytes
SHA-256: ee804c493f185badd9c68ac85b7285fa7d3a2467f99e575ea6ff5b7f56822287