Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf28906f3c2fe3c…

MALICIOUS

PDF

85.9 KB Created: 2021-08-31 03:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6dd8958d9af47c24ee17478c1055d07f SHA-1: 6c169012b9fb81e9ff9054b582fb974f36e43267 SHA-256: 2cf28906f3c2fe3c4296c74d955a86591d2d7b6c95397d52aad902f3ebe8f7a0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host a large number of links, potentially to spread malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://philabc.ru/uplcv?utm_term=words+shakespeare+made+up PDF link annotation
    • http://mtsp.by/userfiles/files/gareretivusadu.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/fuxifugojefepaf.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9d8f45875b---teludexojafeveruwo.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/pobokigotaxexozaxokew.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092650aac0bb---98334754710.pdfIn PDF document text
    • http://megalaserasia.com/upload///xosiguwusuvasaxejuliv.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6bfb5840---29216505039.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37263c8c1b---vusokedobikavifu.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/1639831025.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/18353195299.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bdc4503f2---kotevunaraforasaromeru.pdfIn PDF document text
    • http://metrokentakifinan.com/resimler/files/72385214616.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/8e41d1c6175b289b1290c2086ad3aad8/95894063739.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/99573312148.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8f2e00b4b---rijajosapekasumo.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5154a1bca9ffabf6282857072057072a/96523893423.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/7d9c674578bcd44ade0ea30c0c0c3c9a/55671280171.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/kuvevamev.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/s6nff5rfvt5vjtmud8qlh8blar/fonegizetumaxapebebuwe.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/41639105963.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/vptp65jcfeadjus29qt0i857i7/loluvefowufar.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/48188879393.pdfIn PDF document text
    • http://faxik.online/ckfinder/userfiles/files/30436076606.pdfIn PDF document text
    • https://bauarch.bg/files/xifitetojaxemewud.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_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D6 18780 bytes
SHA-256: 799dff5c3419cc19f4f338e540f5cedc2b119b69417e26d47ddc0e1186d9371a
font_02_sfnt_off000131c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C4 10504 bytes
SHA-256: 1227c76e3d4d1c9af8570b3caa7b090cc71a24a68f6f06a3e7811a1824f40afd

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