Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e62772817631b97…

MALICIOUS

PDF

72.1 KB Created: 2021-09-19 12:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e9d3890b11757b311f91839fbf977e15 SHA-1: 5d022c98c5fa1df92ff1e7bda7a6c033f46069dd SHA-256: 4e62772817631b97f789e368c0a014e419357eac7352bac33a6038837b8b58fd
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to various domains. Notably, several links lead to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4126

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://pixomot.ru/uplcv?utm_term=police+cheat+in+gta+san+andreas PDF link annotation
    • http://engroupe.ca/aym_image/files/66937615584.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/21692411117.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/zagakedazilarovaxatizi.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffa1a27842---58282879423.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/wupulale.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/sanozunuwut.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/92905530897.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/52207318245.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/saxuwakupeloravuni.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/24a30599ae17a87abf3ed4f6500a8624/lumufexigekusisim.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/lorif.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/39036681504.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/67d0597a5ff68c5c141ab39f3684f558/31520867469.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/73156117391.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/rejumaxedanotatifixode.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/nisiramafajefifokiwotawuz.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/vimifalununoxazow.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/busigemuzigurikope.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/65744468790.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/u5qkr98duq9mcaclv1r3v7m5ka/75701689018.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130141db0305---vimazisozim.pdfIn PDF document text
    • http://chpcentre.com/files/file/kutigoro.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/30807097497.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41799385672.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/87735489325.pdfIn PDF document text
    • 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_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 10652 bytes
SHA-256: 009769a815bc7da102387297886184b83d144ff3760acee9051c31d59fc369f1