Malicious PDF — malware analysis report

Static analysis result for SHA-256 84da5d6e886ef05e…

MALICIOUS

PDF

119.4 KB Created: 2021-07-08 00:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 6a57706047c14603127decdefb0b80b8 SHA-1: bccf7b2cfed29d8b7d8794d3cde0269ef2ff72b5 SHA-256: 84da5d6e886ef05ead737999dba15a5aba4a2af0e0962f48cae90c0e231da016
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the classification of this file as malicious, likely used in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6624

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 http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160af919c47e83---rizepapapeb.pdf In PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/terutivukita.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/27899357657.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2a4142e76---zudamata.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52cc87e63f---51951982477.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/4793b77e7bc96468f5f16a6e9c1bf462/gazamalagegivijuwowo.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/44595735916.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608599f3d7576---87170013569.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/murodado.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/15816168710.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/vutisebivi.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/41257656576.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd49997a9a7---raluvobazumiridom.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607270f7da984---lovulox.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/60058109a3b4d911e699e1090b5273bd/lofofa.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/73923412603.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/16762778243.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3623c35a85---38171747882.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/fakofolebudulupulira.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/4588e2c629e1c49bdc4acbed4a034f9e/18139938327.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/sudew.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c841ae1930---69642119725.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/e9ef33e18ed527e103f200b87f4abd82/vexoketutibod.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210624/210624215548767025l0bp6dyo5ym0.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=history+of+lung+nodule+icd+10PDF 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_off0001bbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBE6 10868 bytes
SHA-256: 3908ef851f0cb16ef022c333b98af54191e89c46cddb8245e59dffb8cedeeabd

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