Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d9110d5f561b0d…

MALICIOUS

PDF

72.3 KB Created: 2021-09-28 03:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 258b6929dda2bfdc482183e0d1d565e6 SHA-1: 436f0226a889ac91a114587ead81d8bddd76c096 SHA-256: c5d9110d5f561b0d4e49a3076cc681a585445bfb5a5f146a70fe2b51fd128eb6
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://pistant.ru/uplcv?utm_term=ultimate+motorcycle+driving+simulator+mod+apk PDF link annotation
    • http://siltukai.lt/userfiles/file/66460677584.pdfIn PDF document text
    • http://hongdacable.com/d/files/84023844194.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/95275463398.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613df3697a845---deziroxur.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/rikodutosejuvop.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/38271554966.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/33908114991.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/23182917193.pdfIn PDF document text
    • https://grnca.org/img/files/files/45615414645.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/wuwizuxakewabeloguzobu.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/9544953223.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/xixugebovagokubukujuxal.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/79953294134.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/29102093810.pdfIn PDF document text
    • https://viceda.com/userfiles/file/60770755309.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/64296846453.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/62988260839.pdfIn PDF document text
    • http://aimic.com/userfiles/file/mixusumafisoj.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161516efbc7077---65810172825.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/34417689244.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/21925120902.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/75868444659.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/da10a16be804c36904077c73a5b7f5df/bajixesodumalujugebo.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/garemusedupijukus.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/h54sl36gatp92pt2b0lci5bm9n/30385027062.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_off0000b2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BD 18148 bytes
SHA-256: 8b066da4f2db6cffe33d65defb44efd1baf232681480d4fc81e77e6b7cf6cd97
font_01_sfnt_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 11236 bytes
SHA-256: 26a9ab37cac4ddaa8c455044632c13fdf688b6fb2a0a77b450af1ecd2fdd0393