Malicious PDF — malware analysis report

Static analysis result for SHA-256 70114d8f9bfe36e6…

MALICIOUS

PDF

84.7 KB Created: 2021-09-01 04:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7726d2d16b17a82ecd1967763f3057ab SHA-1: 95b1a6320814e90ff6896ce3e391f35d24aee95d SHA-256: 70114d8f9bfe36e6dddc77928baa1a6b4791938f7c62bae6e1a4b5caa8478b16
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on domains associated with compromised CMS uploads or identified as disposable hosting, suggesting a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and link farm heuristics point towards a social engineering attack aiming to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://thedreaminitiative.org/Content/Admin/uploads/files/74756689644.pdf In PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/127f1bb6377b35a507ca5cb3590d1407/43623881895.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/wobewepoko.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1df8a4340---lozojokakeg.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/81743658469.pdfIn PDF document text
    • http://2rent.gr/userfiles/file/74358269016.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4393357f7a---21350208677.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160aa958a5c638---rovover.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/39999969642.pdfIn PDF document text
    • http://tce.vn/imagesflashupload/file/zinun.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/c8ca0f7afa8d1e9f0f13e84351cfed87/10535911252.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/83079805608.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c97cf4e109d---kuduteno.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/83162910386.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/kvps3cu273vviofm4a26pmuua0/zujijasuxotepixo.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/kikivesulofifujirisos.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/1m4vturq47d5bpr9p6qf3e4ljv/zubejanapapugatunufug.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/walovadu.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/bemimukumodanagabozizu.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa0932c5701---nejobafuzopajobujovini.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081e4275a769---nibavasifugazir.pdfIn PDF document text
    • http://novichiha.ru/pic/file/48916001684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=complete+this+sentence+using+present+continuous+tensePDF 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_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6F 18988 bytes
SHA-256: 0ac79ce6e8adc2305c4eb959c89b432e963d5ed21283efaef4c9139cf2b3c954
font_02_sfnt_off00012b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B65 10788 bytes
SHA-256: f261646a4fbe1edabeb977d710e75bdf6852da12935de1c5d1be5785fcd03763

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