Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c3b8ddb9681867…

MALICIOUS

PDF

81.9 KB Created: 2021-10-20 23:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 91853bb6120a54d137b9f803dce130df SHA-1: e9225ffef599709b97ed6d8f7e2e614d5aa90d6d SHA-256: 25c3b8ddb96818672288c82c6acb96fe23485d18d47ddde2059b270cc6af3a8b
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://abwvictory.com/uploads/files/45938601541.pdf In PDF document text
    • https://phunhai.net/upload/files/56738881790.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/68174407576.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614f1813ad799---5473342452.pdfIn PDF document text
    • https://khanikango.in/file/miwumanevabififowan.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/sarujusoziw.pdfIn PDF document text
    • http://mindennapi.hu/upload/file/66852501831.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/goforuniwogozes.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/19007947603.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/mozezidududewivofeda.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ae9eda4eaf09d2207ab7e4c320c51ec4/xadipomunir.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161531a2871bc5---nupegorubifovibakuzebu.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/54483639462.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/jipobujalo.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/sajevivijonorivoke.pdfIn PDF document text
    • https://eklyps.net/images/file/40950854418.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/xijanopeg.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/59679112028.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/5081046884.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/df93eccf6e912db7bda20ebeb7499449/38139308829.pdfIn PDF document text
    • http://cl-pub.com/files/files/rumiduvake.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/disidavizibitapu.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/kedorovupid.pdfIn PDF document text
    • https://oniceh.ru/uplcv?utm_term=how+to+put+screen+lock+in+laptopPDF 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_off0000dce1.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000dce1.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE1 10636 bytes
SHA-256: 255f9c4e8aaa1f072c6fbd5890c2b2bdc12780674c6668b027252111c5f8c2de
font_01_sfnt_off0000f564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF564 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D76 17272 bytes
SHA-256: 28001ab0213fd3a603366466a15ef1b33e59eff0c6813eb7eff1dcee4690537d