Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eea09859ed6da29…

MALICIOUS

PDF

96.2 KB Created: 2021-08-13 14:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7f8f455c2d76ef5daf876ea480b459a4 SHA-1: 60e33384c03b6dc070299d2c2fe1f24b1aa7f9fd SHA-256: 1eea09859ed6da29dfd9666ee5aca8939ece0c929f5f990f7916ab3933c2f6bc
156 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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=dungeons+and+dragons+fifth+edition+adventure+modules PDF link annotation
    • http://futurepoolandspa.com/ckfinder/userfiles/files/fezenoxab.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/tshb7kn1hv7n6b423tbnbjeod3/ziranebafavopifo.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0d473d087---wuxomuziledobenolazufa.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf57068d5b---zifil.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4c22727ba---rexuburatarikugatomene.pdfIn PDF document text
    • http://articolo17.it/siti//usr/foto/files/85307552468.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/22b71c02f09ff286d6d9b0398111f512/laxerigowinasol.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/hfkjvh058jc9hti5hg2884sjl7/41595212755.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/fb0c69ed4234a270c6be454d15b8ca9b/80633872375.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/ziros.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/4255667664.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/06d5f6ba38ac80614a40b69b97685abf/65878180258.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/71369668746.pdfIn PDF document text
    • http://gptools.net/userfiles/file/33676427255.pdfIn PDF document text
    • https://fallsplat.se/file/botadokofajegomaw.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b545dc641534134286294725a32d8846/guziwoxusipizekilutodi.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/5a34df759e6805ba0392d52724dfab0b/rumaruxezijajazulefab.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/93223p7nnh5pfu8e4cpgctk9nn/15834873723.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3707c5d4929382d34fd418ea1b156838/97261904559.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/49eff673334a9244670262d26eb11844/82695504346.pdfIn PDF document text
    • http://khacdautron.com/Images_upload/files/80387954138.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/96162294938.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1332818230609824f95fba7.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/mazogezevi.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_off00011494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11494 10968 bytes
SHA-256: 3535020388b3e42186ad6c07e19cbd7dafa2ec4d698ee6b12514a3ffa7e17135
font_01_sfnt_off00012dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAB 17112 bytes
SHA-256: 3c06993458cc43cec18629ae8def5b28e671e2359249908c7cb711b4d70d5061
font_02_sfnt_off00015a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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