Malicious PDF — malware analysis report

Static analysis result for SHA-256 33af0963eab8a93a…

MALICIOUS

PDF

58.6 KB Created: 2021-09-13 00:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 95b3cb6356f9950d22bc865fcc97f23b SHA-1: 2f09a9a515fb9bbff6dba4bf26c68d9347dd5663 SHA-256: 33af0963eab8a93af609f6bd2c91d703adf0ef159cd4b1c967e95a44ab4b5c28
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm intended to redirect users. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports the phishing and redirection intent. No scripts were extracted, but the overall structure points to a malicious document designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4143

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://asfalon.com/__files/file/34940007876.pdf In PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/161380c15d32cc---18506099207.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/xukemugefufasevasan.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/51726674544.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/491660084.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/95477198796.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/63717529558.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2koj78li5ejakqbtbp2pvvb6c/motewunima.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/jagelirugavofu.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/65372436594.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/nozatokib.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/kemowotezurojaxi.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/28469061449.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/rexakowapesin.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/cf5f922b78bee626c6720d1dc0985efc/22654273338.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/zojodapivilevarosanono.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/53483192012.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/rojapejolulakerimexol.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6c2154ecb---94949040126.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/wozelevifazigepire.pdfIn PDF document text
    • https://gres-k.cat/userfiles/file/gotiramupatazuzituxuxezeg.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/83932856895.pdfIn PDF document text
    • http://baove24h.info/upload/files/momukatepadil.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210913061917.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/7614900648.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/69515820846.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0a67a6aa2---45745863896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=cubase+5+apkPDF link annotation

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