Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d6b5599d04cbb1…

MALICIOUS

PDF

81.2 KB Created: 2021-10-10 15:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-27
MD5: 15247fa71fb5383fb9e9671a58b73554 SHA-1: 3e5afeaf0cea81d28c27097594f3ec713d3395be SHA-256: c5d6b5599d04cbb181fba9e86a5a3953f734b3f3dac600504c89842296dadde8
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://krisoc.ru/uplcv?utm_term=right+side+stitch+pain+without+exercise PDF link annotation
    • http://uekekb.ru/!upload/files/82604989602.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615685ca01337---zupixolawa.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210913_185912.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/49819154628.pdfIn PDF document text
    • https://ratoempat.com/contents/files/sogipexazipot.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/gukoxuxow.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/91610414393.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/ea51430e7f70a26d62eb95fa1427eb26/46809359263.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/fobolewor.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/71056812227.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1633472618.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20211009_074557.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/samaniji.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/86968085689.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/39239270077.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/witadewi.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/ketidudusularuw.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/sojufem.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/sazuvobuxu.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/513582818.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/t9uv79a83qrgejje9ot5h0rhdi/90004963281.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/7c6209c3bf39cb49159c4d22169efcf0/42074021981.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/82547590962.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 11080 bytes
SHA-256: 6a2b25d5b88d1c90cd80d579bf8c8c1263b858536c08ee80d0339a6568b8755b
font_02_sfnt_off00010667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10667 19096 bytes
SHA-256: 63c16ef46c7d9afa35d82a4a796a26e7a417f7bf2b9baef8b3e6b8ad3c3636c0