Malicious PDF — malware analysis report

Static analysis result for SHA-256 337e1814ddf3100a…

MALICIOUS

PDF

65.1 KB Created: 2021-09-04 06:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1baf59d34c7bdfe75f1d4564879aa2be SHA-1: e11488adf4df7ebbd6711bfb6abaf8d9897019f1 SHA-256: 337e1814ddf3100acaedd2d2c67533c8e3fb5ef53e269e4efaf24a679785d396
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The heuristic firings indicate this is a link farm designed to direct users to potentially harmful content, consistent with phishing or malware distribution tactics. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6738

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://medvor.ru/uplcv?utm_term=practices+of+islam+pdf PDF link annotation
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b325ff22243---patagizewer.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/nabijonisubujabubezo.pdfIn PDF document text
    • http://espokebar.com/uploads/files/gumubenizewuxaka.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/68616192836.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42949041321.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/taxonumese.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/73846893788.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/97910641980.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b8c7b42bd0e8cfe741b2876fa8ea7551/vekobevasolevegopisamivo.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/rizevovat.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cab5a530a66dc956217ed8e03237f4f/difogufew.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/36149721742.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/35832604350.pdfIn PDF document text
    • https://arerp.kr/data/file///84695084093.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607835613b62e---degidatumugavana.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/zudomudebibukuguma.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/kavik.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab68d75701---30461906934.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b3610b31e---molerawoguduweza.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/41139827440.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/60910144797.pdfIn PDF document text
    • http://hainfelderteich.at/tawufotexeti.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/5l7h7mokvsmf3mm4of9devu44i/65936455099.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/85952748128.pdfIn PDF document text
    • 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_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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