Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec9d6df0e0a2cf5…

MALICIOUS

PDF

92.9 KB Created: 2021-08-03 19:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 00a03771f30f25655e869b9b8a851420 SHA-1: f9a15bfb731a5e5ded9150894f0a62cf3128ac0b SHA-256: cec9d6df0e0a2cf50f933b5a1c5506171a798fc19bd1a4cdd2e28e4b4842bb98
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 a large number of external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to potentially malicious or phishing content, as indicated by the URL structure and the 'link farm' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5943

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://drafthe.ru/uplcv?utm_term=alice+in+wonderland+tamil+dubbed+isaimini PDF link annotation
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/htlnu8n5stjulorp5t4vc58e75/91227598317.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/damokowi.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/79942574300.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/f8e9e414786409e2b8af2274f9ba392e/joderu.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc2b8402ff---fenogusowajulip.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/18a5d3d3ebc7502f59b101873f26790c/rojobeloz.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/zasopatupaxajaxelovurat.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/80866773796.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7asape1qae4cgu9kgq93vq7gns/supanoluzokinimoxufixa.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/gelugesobarorarugitawafus.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/16861464535.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160827d6a8d6c6---49680033224.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/79754252308.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/vamolijod.pdfIn PDF document text
    • http://fructusartis.com/i/File/rewobo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ee7e30900---93519554657.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/zekuponujevafup.pdfIn PDF document text
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/wobiwasubukupavutesigedu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b03d1f113e5---kaselixadedowowumuwalele.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/443aqq0vnou4b45cn6slgmbjf7/83853823869.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/ginosojifabe.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e91dd9ee73e---pugopasul.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a7a1e05f1d266c83f6b1ee57aa5df67a/bokanidatiba.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/bigesaxite.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/a128c2b0774b1e4168e9bd9e601a6b9f/begusojepoxabezififivub.pdfIn PDF document text
    • 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_off00013a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A44 18156 bytes
SHA-256: 538cc307d7f99b3e670af40d308848b8219e7b61ce8a9397f215138e25feef43