Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cdb0333e44487f…

MALICIOUS

PDF

69.9 KB Created: 2021-06-11 07:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dded1157ecd0a6ea0ff13fe70dc310f9 SHA-1: c9690fbab1139c27db9fa5733b2eb927196051b8 SHA-256: 22cdb0333e44487f6380e93df06acfb88791d1b498e1d764301de57f67124f78
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution attempt. The primary URL, https://inwebjor.ru/uplcv?utm_term=download+ssms+2008+r2, is likely intended to trick users into downloading a malicious payload disguised as legitimate software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9571

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://inwebjor.ru/uplcv?utm_term=download+ssms+2008+r2 PDF link annotation
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a107393c4cb---12854993399.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/42824814657.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/0921ef185a9509ae1c6a5e2bfa9b9894/mulisatubopuse.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/e5a52da96dda1c5f02e94741b2bc09af/bubilaxoset.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/31973204127.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/e0f41ef86e9fd1b610b82a4eb9f5c775/lufunirozawilemonufuwumi.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/804f967cbeb597dd42047a59e9c3f7a5/82576865607.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/majujisosiruz.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/43057277741.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707741c1569---gavijuvagebigonawada.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b83b413e3e---63923092819.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/41412582596.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073fe9aee857---27735913781.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/bb14e7f1aa12182c73c8a068e981212b/99141177534.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5532 bytes
SHA-256: f81565413a850baa27dba15deafb7cc427965881995891017501604b6f896f1a

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