Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00a6aa22a08c55b…

MALICIOUS

PDF

91.9 KB Created: 2021-07-08 08:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 942076408d948bd92dd9b2517b65f9ec SHA-1: ba045692877fce20e88e50e934dc73384b9ef154 SHA-256: f00a6aa22a08c55b72742e1168f124b994bc33b15dee320f8dd582771dd23d5b
156 Risk Score

Malware Insights

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

The file is a PDF that contains a link farm pointing to multiple compromised WordPress sites. These sites host other PDF files, suggesting a chain of redirection designed to obscure the ultimate malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e236fb5d0addd03ee6c29a7396e763cd/rugotomasuloluxopejivo.pdf In PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b75793034---zufudituruloseraxi.pdfIn PDF document text
    • http://funperm.ru/content/file/1194123864.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085049269054---zunagi.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/dawesubusafikisilowane.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/66904476346.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/d06e1fea21b4b3febf79932c1075f220/vibiwemevoxegudikewe.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/xivededalepigutonipa.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/lokarepusolobutotebi.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/120e3e434ab754ed7fe64c7afaa8b48a/labibiwu.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b34d84036---fedofumabefekowemol.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3c49992982587be72fa00e7d5f6c043b/dolofewugaronuwukapapa.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/mekoduj.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/27804432203.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/22a954d4ffed66866d7b3f23b8fcf42e/11049251248.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16074c751171ae---gogur.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3acb8d494---ridakasabanegu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/umoofbrvt5p55jqtefvlotg7h5/dexoritibovuvadiw.pdfIn PDF document text
    • https://davaocarrental.com/images/file/lanevuvoxajikewidodije.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/5ee1106c64f39a7163c85fba794875fc/75392247817.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3ca6986e0---46772704726.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/fikodeliwanasigaxexo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6113bf441---47489852755.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/f4d84dd5db51b663e776cc67741ca272/28609066670.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/zekid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=computer+graphics+and+multimedia+question+bank+with+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 17636 bytes
SHA-256: 118fbbfa63b3f6663a9484ce520433fb10dd575268a62323a4944149973d954d
font_01_sfnt_off000119db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 11556 bytes
SHA-256: 1dcd87be8668a83952b099a50a55830c609d90ee597774c9df663bbf02b8a943
font_03_sfnt_off00014c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C83 16224 bytes
SHA-256: da79484a7f94e028a8871d907a282bdc2df095dfef79f7b1f2af1efeeab75da7