Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f652020d935817a…

MALICIOUS

PDF

85.6 KB Created: 2021-09-17 21:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5425c6c29930943032586ef2d7b92e59 SHA-1: 25032619cffa21911928db8c3eba582d1c921d05 SHA-256: 6f652020d935817ad959bdddab719eb86a456b876b49df6c65980f2edc44eee6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malicious content. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or execute malicious code upon opening.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=dr+driving+hack+android+1 PDF link annotation
    • http://devitohomesorlando.com/userfiles/files/nufiwabamorom.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/9354281495.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/40140734800.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/gonaketumajafuxukaxel.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/konuvanejewazodix.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202109050324285269.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/76749627928.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/dagatupuneralibunalosum.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/28662668551.pdfIn PDF document text
    • http://mytrangroup.com/uploads/userfiles/file/fukoxedanevobekapo.pdfIn PDF document text
    • https://solturism.ro/images/file/rixoxuxelorozulamix.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/rifojifudefinok.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109010725271920.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/55508833850.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/3405503165.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ad29b39fb965daa17ad58494856ba077/55450368655.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/5f92365dc253384ade629af24cf1f804/36909316491.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/026bf8af416177629133c6f6e495de4c/gilotunonezevumazoxed.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/57341693877.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/sujesokutojuwon.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16134a3ac6016d---nirixisenuvaxesejosuvab.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/nufamubipat.pdfIn PDF document text
    • http://infiniti.e-library.tw/uploads/files/jaxevizeselit.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/dejudozuxigitivi.pdfIn PDF document text
    • 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_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 10416 bytes
SHA-256: 2c5d17f8eeb7e80db254179040ae55a51839dc0f81a679b789100ddb9ec1e69b
font_01_sfnt_off0001044c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044C 17124 bytes
SHA-256: 1feb6941ebc2cd66e6ba44e0ab54c57784e1e319dbea7ea3cd2a313615771d46
font_02_sfnt_off000130b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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