Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0cf877266ebd418…

MALICIOUS

PDF

76.9 KB Created: 2022-04-08 20:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-02
MD5: f68efb5bc281f192b389a16a5c332b32 SHA-1: 8034d88a7e7e7a03487a7bcc1a7772df0ed9aae2 SHA-256: c0cf877266ebd418286191e72d1f15d42077108792b8d28ba2e436c53a8e6788
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://tuyendung.btccorp.vn/uploads/files/63883261260.pdf In PDF document text
    • https://xulisonifob.weebly.com/uploads/1/3/2/6/132695361/6e8995945282a68.pdfIn PDF document text
    • https://bikiwilusi.weebly.com/uploads/1/3/4/5/134512037/8563660.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/6157f9ef9.pdfIn PDF document text
    • http://weldbook.net/upload/files/20003552667.pdfIn PDF document text
    • https://bolefusugo.weebly.com/uploads/1/3/4/8/134868203/0b31674ee6.pdfIn PDF document text
    • https://duvarifa.weebly.com/uploads/1/3/5/3/135347264/7567999.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/59603338408.pdfIn PDF document text
    • https://labadejasif.weebly.com/uploads/1/3/4/7/134718281/5506016.pdfIn PDF document text
    • https://motelandratecuci.ballroom-andra.ro/userfiles/file/39575710651.pdfIn PDF document text
    • https://nibevomixosu.weebly.com/uploads/1/3/4/1/134108547/rejutoxopig.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/zobumabefabepoz.pdfIn PDF document text
    • https://kifofudodor.weebly.com/uploads/1/3/4/8/134878181/676194.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/busonu.pdfIn PDF document text
    • http://alkord.kz/app/webroot/js/kcfinder/upload/files/37677881960.pdfIn PDF document text
    • https://kisogegexene.weebly.com/uploads/1/3/4/3/134374262/ab54e66442d01.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/ginumokozi.pdfIn PDF document text
    • https://venolebibu.weebly.com/uploads/1/3/5/3/135348563/1122271.pdfIn PDF document text
    • https://scorestop.com/uploads/files/kubavofe.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/xarewiroronituv.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/99292588548.pdfIn PDF document text
    • https://falototadapi.weebly.com/uploads/1/3/3/9/133989324/gatekusavuko.pdfIn PDF document text
    • https://levavepisemewo.weebly.com/uploads/1/3/5/3/135303450/2442202.pdfIn PDF document text
    • https://wirut.co.za/YmrXLWy8?keyword=difference%20between%20content%20and%20process%20theories%20of%20motivation%20with%20examplesPDF 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 extracted file (font_00_sfnt_off0000c833.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c833.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC833 11280 bytes
SHA-256: 788d7846e6f49fb6a465e34439467380513c96eafdbfa6bf9ceec2844f257d67
font_01_sfnt_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 16400 bytes
SHA-256: f31f45886388dde45f41eab4c17db0ea2a05a16c6b84c9ab51bb8a5a551eaa83
font_02_sfnt_off00010ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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