Malicious PDF — malware analysis report

Static analysis result for SHA-256 52dc0c466e042b7a…

MALICIOUS

PDF

70.6 KB Created: 2021-09-25 19:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 844ebedc050cdd563dd0def4a0692b09 SHA-1: 1c6eef22b66645eb00ef59ecdf4956cae6c2896d SHA-256: 52dc0c466e042b7a2332897f3b28a41d3df915f1a132dd7fe33bed0ca58bf2fc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to various domains, some of which are hosted on compromised CMS platforms, suggesting an attempt to obscure the final destination and evade detection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cafepiolho.com/uploads/assets/vowomidebunagowiwufopas.pdf In PDF document text
    • https://dottoridegregorio.it/public/file/vosudibigofewowidozexo.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/nojaxejodimaniki.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/58626371720.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140bbc37569b---fugisisijotopuxopawup.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/pidupot.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/45439297691.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/17294923264.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/bazuxutep.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/78453558038.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/52062744469.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/jufipozafima.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6189da538a91f01539b050b7b8452955/dapabadufax.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/89511831251.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/17867435487.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/lisisokirufexegaza.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/fovasabidubizetekolumalo.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b42f5c361---fafowatekopotekumov.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/91487591612.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/zikanewigevajuj.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/12070603830.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1b6b0debfb0ee26032e77c5153f144b1/35447826988.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/boreruvalo.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/wumodunawafatanu.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/526480de72e8a29d4a9d71ce9a667b7f/58910117651.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-17/20210917030221658453.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=watch+online+so+i+married+an+anti+fanPDF 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_off0000b406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB406 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1D 10732 bytes
SHA-256: 92a431c1b1a50d7a68636c15772dbdfced2509221ffbd34d07fc0d105c320864
font_02_sfnt_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 15640 bytes
SHA-256: 7193d26d976498a1842111e322749bb8fc1f1d36b775b4e472c1cea8c9c208a5

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