Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a9e19096e84e3b…

MALICIOUS

PDF

66.5 KB Created: 2021-07-02 02:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dfaff4a8af85eb47d15244f0adcd8c38 SHA-1: f061e1844078eed53761d4a59e362b595554c7fb SHA-256: 33a9e19096e84e3b5328a3230c25e59eb5b3ddcd9c31c8faaf54b08cf2f5c206
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to lure users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of UTM parameters indicate an attempt at SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3638

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://cructi.ru/uplcv?utm_term=electrical+engineering+in+oil+and+gas+industry+pdf PDF link annotation
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ef593606c---punazop.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/tifolalapor.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cgto1765u6ugi89us5vbf15695/7637186200.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b4c80a03c---tesowukalozejebediw.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f3f187c5b---76101842434.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/rawefopesojodaf.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/tabumusug.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/gomomapaximi.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/76619895272.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/91795654474.pdfIn PDF document text
    • http://funperm.ru/content/file/folodesuzuletuwufogi.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d25a23674---mukuvarevegi.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bc321206286---buberavopurumagelolibi.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/ct2jv15n1122jkhjut21fc7cbh/714935223.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/renuvexe.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/60140370314.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ot4jb0p1rtkfmkp9rnd9us7n30/15792164971.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/a42c70a779c50339ac8968e7d177b4e0/fakubitu.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/64855482361.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607233ac699c6---68011949059.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/7212986b5f323bb1c436c788f1f2f1b0/31583444684.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3b88e7d7b---94499599626.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/817065847.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de1cbd59620---wodexifugobekelodawibige.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc28466e68---56373476527.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/16815828869.pdfIn PDF document text

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