Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f156995efe78ff…

MALICIOUS

PDF

101.3 KB Created: 2021-09-04 00:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 94ec2af63bc97f110c9edfd77e7aae0f SHA-1: 8a5e678d00defcd2c7ad4b819855bc4184937cd9 SHA-256: 84f156995efe78ffee07f24ab38f8a40b624f57c1c2b296c65438ed58b118cf9
132 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV with the signature Pdf.Phishing.Trojan. It contains embedded JavaScript, which is often used to execute malicious code or redirect users. The PDF also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites, suggesting an attempt to lure users to malicious content. The presence of these elements indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2805

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/e0d12jbuucnaehu4ov3ksoe5dn/geverox.pdf In PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085562244b42---95763414111.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/89305431574.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/jusarosaxarozif.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/d4cf6999bf0a6ae35861ebf1ee9199e5/8783702451.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/96349084637.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/73736736575.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/36584013468.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/85129526441.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/55826081035.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/pirukisibibidogefavaxurim.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/kinejivuzewumo.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/silifi.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/78417269294.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/35586440912.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/64294053415.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109011253429264.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/xufoworufan.pdfIn PDF document text
    • http://vizcsap.hu/files/file/vorenog.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e6e34ee8c54---18568960185.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210525174714627.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8e4fc0a46---94395502662.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afde9e1083b---12525544078.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/24357745746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=gktoday+current+affairs+may+2018+pdf+free+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5C 19856 bytes
SHA-256: 6c1ad74c6fed94b5f15587ae87694d0b26bb45a69e00f78e50d3d5314ea94739
font_01_sfnt_off00016f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F40 11712 bytes
SHA-256: 6ff2db8b54cc0ddb3aea110b5940eecd33c65dc0e231127dbf49629810f813a4