Malicious PDF — malware analysis report

Static analysis result for SHA-256 8569359ac43b8ea6…

MALICIOUS

PDF

111.0 KB Created: 2021-08-07 17:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: aa5ed44a83c59a490a2299bbf45b152c SHA-1: 628ae9600a5a3deca11cd2eddc9df703d2d3b822 SHA-256: 8569359ac43b8ea63e70af25557e63d6b26915717cf0907324903d8e21e923b1
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature, likely serving as a phishing lure or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8173

Heuristics 5

  • 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
  • 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://ketchas.ru/uplcv?utm_term=escritos+de+conchita+cabrera+de+armida+pdf PDF link annotation
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a242e0b5---kobetojisiberon.pdfIn PDF document text
    • http://salkim.com/userfiles/file/1480967376.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c3eb8e93e---16363062550.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/611b20e88a9490eb2b62769ec133df68/96570925261.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/83639697106.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/16101397223.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/gulokedovukerefenojetofof.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/buxokoromomefabaxuzi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdd62d59a2---sigokiwelase.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/qq0vjb20terrnce6uolfdlnt54/vivetil.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/kefapadugododonobefisiz.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/rj15bjrm7tu2br5smnbv37jhgu/gisekik.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/wuxiguwiv.pdfIn PDF document text
    • http://metallpress.info/files/kajuxodazabidedujejipumar.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/716203b550185d6b9906e7fe1395bda1/54489154171.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/lavapukasumekixezetu.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210702041206_owmm9s.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084226058953---48216903574.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/kmcpj3bgdis416p4jre5capdso/54831594506.pdfIn PDF document text
    • https://gannat-ltd.com/userfiles/file/pubijeperesuliniz.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/s1cplr8sf1saqjp21hvf26stm4/16868115146.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/29882082475.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/84501773379.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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