Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ef761dd9281788…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 20:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 60f14622cf0035c681774d0bee1a0dec SHA-1: e57617607ed9330ff642982762b9b48ebacd4c3f SHA-256: 63ef761dd92817883f2a9e889a8ae5cc26b56e914d8664014b3e4acaba94f318
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress sites, which in turn host other PDF files. This suggests a multi-stage attack pattern designed to obscure the ultimate destination and evade detection. No scripts were extracted, but the presence of numerous external links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/0ab4deeadca8581da4d36c7a5edf2a74/juzefawatuj.pdf In PDF document text
    • https://mackbeks.com/files/file/kovufexomisipisuvoxakifok.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109190606233136.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/31935268800.pdfIn PDF document text
    • http://geose.ru/userfiles/file/satujadidegudikitipetapa.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/65796203120.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/0f687d26cdbc2e6a33331d10e382a575/febuxakorulozoteta.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/rukobivumofulojelowodole.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/fedogikisagoserixa.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161408e85bc85b---kiweviwiga.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/wofeluwodunabuwefagegak.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/cds1hbnouv3fjhptmds6o5v42q/larebeximegu.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/81842485577.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/89517191404.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/tukasejazobosoga.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/38659664406.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/63516505609.pdfIn PDF document text
    • https://kopari.hu/files/file/sujibolobopifu.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fdf9141fb---12947397718.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/vetogazisufimezosuvadose.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/13197571508.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/93045738810.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/85342826631.pdfIn PDF document text
    • http://word.mn/uploads/assets/xazotamibedozuvexilulelop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=iphone+alien+ringtonePDF 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_off0000d7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 18520 bytes
SHA-256: c67fc28a4f0c2a368d69597f0eb2c6820f4ece03df4adabe572f5a1d5f391711
font_02_sfnt_off00011fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEA 10316 bytes
SHA-256: 4ad17bf66a74efd5537e347e08a589f5d2f4faa21a9c1e14f170e2b64b8a75cd

Open this report in the interactive analyzer, or submit your own file for analysis.