Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2017c90ecb406b…

MALICIOUS

PDF

67.8 KB Created: 2021-06-25 18:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a8c29c0bbdcb8eebe603c62582bb643a SHA-1: 7b88fd3924450aa023935d21026ca798d71ccb3d SHA-256: 7d2017c90ecb406b7235acf1b4c548c27fc1ac500d28988a304ae5e5b56cac80
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristics indicate the PDF acts as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6824

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://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/chq8akp7vlu3s70845h26ioukr/17258649742.pdf In PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a97b9a247---67483008089.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/675f249aae28a91e0cf6b24642b7a8e4/wetelibanexisusa.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c983ec623b---nogabonuvox.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608826e1c0538---puforegurupobelu.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160946bb8a5383---24667662457.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a24ad221b26---58167987095.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d95fca0fc5b286788032e8eb6141a447/fiwamefog.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/6aff647013d72ae0ee164bef0257941a/norajivodezizojuxef.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ogupkhpvr499f32lc833vmnr2t/divajifoguzazomudizexolut.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/i6dorflm4ukm7dlhjgf2lddv3g/vimax.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/33c692c80a85b46f4ed9c13b7bf2377b/92369141718.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/18139861091.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/9e5cf662c3b816d9afee135f579a8892/10915807027.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/bufifibamikevopib.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/10191223981.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/739684dddb3613b0ec85130ce0e5d208/disosixulunovevusima.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/ffa137897b59b4ab6248361dda53e592/pofezag.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/deatdgqd4amp069m1joh0nanvg/vazoputonomusubola.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/vudekixipoxe.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/9010590245.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/0ecb5002fa598fb2fbb381bc324bfaca/2085293313.pdfIn PDF document text
    • http://dzbnf.com/upload/file///venalakem.pdfIn PDF document text
    • http://apsons.eu/files/file/76780910703.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/xeridozijunad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=download+powerpoint+template+animation+freePDF 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_off0000ebd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 10580 bytes
SHA-256: 19e50ae4548f48e6467beaa11cf83b230661e708906e8998c3d60b3fe12cc08e