Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e310858ebfdb14e…

MALICIOUS

PDF

102.3 KB Created: 2021-07-27 23:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: a3e9c6eda42fa02cd81822cbd652c84c SHA-1: fbab9e8b690f94723a34623e5f02b2548bb13aa9 SHA-256: 4e310858ebfdb14e4cb85344abfcaa5c63e72f559782c521071770e5c7205d65
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vijyaiprismcrm.com/userfiles/files/jofuzolozuva.pdf In PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/jfjg7vadc3p9v2kuvh739bafab/kabetinudozejawamivur.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cadb9dc45efa4132927eb7fe08867e35/54629260110.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/6e7ae66fd97a919d633a191fcb32c412/359471585.pdfIn PDF document text
    • https://dm288.rs/slicice/file/33465495376.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dfb6294f2---86986553692.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/kosukim.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/s8k1o2tst1h1njp2qp3hq3pu4q/rutewizoluzezaguna.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/f53e72418ad19718dbad2d8a6b14fd4d/14994796888.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/a8272ee2b1fad06eb40d69dece9a25a9/84181788237.pdfIn PDF document text
    • https://doctorchina168.com/upload/files/poronifisugetuvem.pdfIn PDF document text
    • http://thediamangroup.com/_images/files/14616348177.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/20e8c3ef71b53f893ff4c8858947b437/76746923824.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/bikebigakexik.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/tpj624h29p4s1jqa69f7o81sfc/23132851501.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/40010591759.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd26762649---numomowamupugurebabidud.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/j1eo45akuf8dpknd8u4oucqgjc/dugoxi.pdfIn PDF document text
    • http://raczcsalad.hu/files/jufoxipunukususivonufivo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096280f84065---86052310305.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607701afdf979---retigos.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/92590977575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+to+wear+in+a+sauna+blanketPDF 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_off00012b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14317 10616 bytes
SHA-256: 58004921cce5af99778d7a4152164e7dfad79eaf059b514cce0c4ee5e69e41eb
font_02_sfnt_off00015b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5A 17752 bytes
SHA-256: 791943af1c6e4eb4374d96df6dc11b892fc2f62224a2b4e0e56d3e02770448ea