Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67ee24847efa660…

MALICIOUS

PDF

77.5 KB Created: 2021-09-05 13:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 823787e29e5216063a3953bd0aac11b9 SHA-1: 37317a90e5da8839d1641cc5d868d5ad30927880 SHA-256: b67ee24847efa660f436209835ca7f50f6c4f1d4c443ebf9cd83996d7aedfd8d
154 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites hosting PDF files. This suggests the document is designed to lure users into clicking links that lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8105

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160850f4ab93d5---40176496884.pdf In PDF document text
    • http://al-bandak.com/userfiles/file/lusinelexejowewisafes.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/a1o7c50hdjr9ke8l39cspjfnvk/46790858022.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/95eefa82cac70d755830ea364c15315c/40904484980.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tobimerivifopadam.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/mapatixokok.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/nasoxapufexunor.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/bafiradixex.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b79109d6cce---finado.pdfIn PDF document text
    • https://avflash.nl/upload/files/16506548929.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8edf281639f2de5421f201f2bf011588/wulazeromewebupininud.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/vakijomenimeb.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608886aef09e8---wokerumovebabemigowilagek.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/xitewidibuwewed.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/tepufobumupurewekoribi.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/79876160863.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/gijerofonisapovipitewu.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/28157263821.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/gelakekerukatusovakubu.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/bidazeguzuse.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/36011486572.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/97522892170.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/05e7c9087d9dd7a18550a342cd5e38a9/fenufonedajijixipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=aleister+crowley+magick+pdfPDF link annotation
    • 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_off00011c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9F 11132 bytes
SHA-256: 2263a41870611a79e312a0afc7fa4255d60c4698083843a179b04d7cbe326b70

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