Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d6680f0dbc5b7a…

MALICIOUS

PDF

39.0 KB Created: 2021-06-23 22:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0443fd9befb6beb55661ad89b939164b SHA-1: 89320d59d40c74441b80ec8412d209d06d77dc67 SHA-256: 42d6680f0dbc5b7a3941a2387e2d3dd41a8821757633e94b4d64ee9a64652d29
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://krisoc.ru/uplcv?utm_term=moto+racer+3+pc+download PDF link annotation
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/2ba9f1df5e9e3cde241b3f1acb255f16/nebukubibijumogi.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce773b731ca---vibinujubuz.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/49210700446.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16091449e8cd7d---82289982613.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/dikal.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile/%5C/jiroduzanejinukikeko.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6e0bd0a65---fodejaxifavakibug.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/8593cf1f3f69f20c6cd6ec01c686894b/sarelu.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/59qfho7g7ifns1ga8nokni3oe0/20250170085.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/5915988613.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/3rrglrr4kgak98blaouoebo6d6/94734536029.pdfIn PDF document text
    • https://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/c8bbcpg8vuueune7j8i40t954k/zixizolipopupugotewele.pdfIn PDF document text
    • http://deauville.ru/files/file/sakefutometezerobo.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/32499573495.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.