Malicious PDF — malware analysis report

Static analysis result for SHA-256 42511ad384227638…

MALICIOUS

PDF

77.2 KB Created: 2021-11-18 11:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 11e5f59f4540d0e50fa97ae7cf9c71c4 SHA-1: b56b54b1709cd8bf71093b68534d47dcfe743a8b SHA-256: 42511ad384227638a5293ffe323e617a993d2fb95fbc9535b953ffc2fbfac166
156 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
  • 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://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1618dc0f0dc688---88756970793.pdf In PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/78116704165.pdfIn PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/roxegufib.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/pedakemekamuraxuzasivu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f9ce15c1b852ee6c6ba30d58028d984d/52120707040.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/82f005792ca7cc48318caa3cf10f1ea4/53342841330.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-28/images/files/3429083183.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/78400984471.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/1ac7a6dc8aa4726f288dcefe99c4c241/37465539550.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/vuwelodomemovigi.pdfIn PDF document text
    • http://suurelepa.ee/data/file/kudigujigisu.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/28499074465.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/nolowuxibonaberir.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1618bf01d31c3d---86794001027.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/gibunanogojis.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/77788229149.pdfIn PDF document text
    • https://camerabentrenet.camerabentre.vn/ckfinder/userfiles/files/kobuxusaborig.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/xuloz.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/12168069741.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/16634198082.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/80de1cef15ec2a4d6a860c707fa63b22/vimogabos.pdfIn PDF document text
    • http://bresky.cz/res/file/jotoripuraxovefurovilos.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/najukure.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/23D8k0Ec_6w/uplcv?utm_term=future+continuous+tense+exercise+for+class+5PDF 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_off0000c779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC779 10640 bytes
SHA-256: b770009619b74399e57cb46c9d17c8e168ea3209b0c8fd59e5d1dc6e4dc1f5c0
font_01_sfnt_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off0000f729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF729 18224 bytes
SHA-256: 019bafa4f4cc0bf28afc0cf9d14cae32c0180d19234c773bdee5341aa5349d70