Malicious PDF — malware analysis report

Static analysis result for SHA-256 c022b14e5585f1b2…

MALICIOUS

PDF

88.1 KB Created: 2021-07-02 03:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 36e9992ae2e60ea31f75610c8bc777a7 SHA-1: 4af8c4d6ded5783ba28fa7310da0bd419f598657 SHA-256: c022b14e5585f1b2904e34eda699a147f47ebff4289ae434719390ceb1af98ef
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://archism.ru/uplcv?utm_term=phytochemicals+are+essential+nutrients PDF link annotation
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/07b0910869a1bd9108eacd64e13fc1a2/4136295495.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/mizovunasatexikazimugimuf.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071556f881be---52537841595.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/josilevetobofopada.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/o3ab4dd3rvtf6nrunu3p6d1ra2/bixogajabedi.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/2phc4fqh18nhjuo6uc1o0cm6b5/70178364526.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/devosivokomin.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c38edb1da---fugusozilofipefawirexapax.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c89ca8d47b905b9b8e44cd9a3c28928f/71742603929.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/10816510514.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210629143317.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/aaa9aa2c2ca0476ab49e75daab89c85f/27822649151.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/mewaj.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/30723105621.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/12178422567.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/db23a0066022d49364e2956bd2731fe7/bixuvoluwakekolu.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210625200712.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773197a4aa8---lililitaz.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/17215801195.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a286e3a482f---xinapufewowimem.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/c97b4b4a7f5dc03c32f45030a2bb3db5/22047290502.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/b3f358c3e8c3fcff605fe7120ea509bf/40211642229.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160923c7826cba---66195123505.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_off0000f4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 17288 bytes
SHA-256: 30fcf5347de314bee4f7c5b72c24dee15767a08a10fc208715daa9e31a57d93d
font_01_sfnt_off00012251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12251 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A68 10708 bytes
SHA-256: 276854d3367445956d33144816be4ee2b3da647783f3162fe04b4a8bd20218bc

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