Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e58ea9117d3272c…

MALICIOUS

PDF

78.4 KB Created: 2021-10-07 06:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b385ef905d2bc15e47ee9574453c8248 SHA-1: d740d96c1c9d37ad171efcfc13eaaf54a1fe48e1 SHA-256: 9e58ea9117d3272c45e4357b0759d93d178bf010d9d54ecc310aef4be9bbc9a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://szekszardportal.hu/userfiles/file/lagowonikafoxululuj.pdf In PDF document text
    • https://noticky.net/akce/fotky/file/84872220347.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/jumufoxid.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/5405598759.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/27251145498.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/78551911744.pdfIn PDF document text
    • https://mayxaydungdailong.com/media/ftp/file/dunodeluferaber.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/90695529865.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/37085168728.pdfIn PDF document text
    • http://northcity.rs/slike/files/xafemoku.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/fukudixavazekesadanabosez.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/58437296100.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/refuvurelisukeg.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/20684878602.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/47916371950.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16152af0a465ed---sugaxuxizofigugokebe.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/dupijotes.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/pejetexozu.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/838a45c23b7869db81d7a4719e9f0d91/bojiwonisuxepidikedozed.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16133f3d2e591d---11363993619.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/tiwap.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/e9184a78a6da0a1e93c96024fde989ff/boxasemopajuvonovaguzogu.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/jigamubokegebew.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/sudaxojux.pdfIn PDF document text
    • https://tmtteks.com/files/73052463023.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=uhd+wallpapers+pcPDF 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_off0000ce2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 10288 bytes
SHA-256: 6b3b883263b82c5a0d6900d706f3ebb556656c47dec905eb10dc54b5b3d47e1d
font_02_sfnt_off0000fda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA0 17996 bytes
SHA-256: 90718b2d331148a6eed4cd9164cb4f5324be84918241ea18c74449d0fec23407

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