Malicious PDF — malware analysis report

Static analysis result for SHA-256 191d174b0dba2fa9…

MALICIOUS

PDF

70.6 KB Created: 2021-10-14 03:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: cbae718af91294e878e92f0ac580def3 SHA-1: c06584db101215ec870a0bb2b669f2e4fb807feb SHA-256: 191d174b0dba2fa9a0ab4c6f492b86940ad0f5cb3445d0fe3180c4b2a4b4c3a9
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://songhong-thudo.com/img/files/53301562103.pdf In PDF document text
    • http://apnschool.in/singhania/downloads/file/75900520275.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/86770173163.pdfIn PDF document text
    • http://rjt1.org/upload/files/roluwimibu.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/gatakozaf.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153a1c03a666---pepomerudaxesepurosekujex.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/58964260502.pdfIn PDF document text
    • http://cutskytools.com/d/files/mazodajejolirokewexesupo.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/92579884521.pdfIn PDF document text
    • https://eetravel.net/file/25843544510.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/toromepepebesanetanutuj.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210921_F9A26CE60E436379.pdfIn PDF document text
    • http://coca-colalife.eu/userfiles/file/82678586799.pdfIn PDF document text
    • https://koratspring.com/upload/file/rixexidi.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/2294087301.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/lapalizameridozizejot.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/7749528156.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/nisom.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/64063108809.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202110081415196176.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/losen.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/KGDyd8lM0uI/uplcv?utm_term=android+porn+appPDF link annotation
    • 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_off0000b442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB442 17032 bytes
SHA-256: 4b19a2c6af62656cef366ed62ee227ab20357d143c32d6d1fc042a9562d86b14
font_01_sfnt_off0000dfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EE 9924 bytes
SHA-256: 0a253fd6b61a640aa3e2e369e725e6e4e33e15c7dcee3bc8a9c8376e2c8b18e3