Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14a9cab76b119bf…

MALICIOUS

PDF

72.0 KB Created: 2021-09-05 13:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e1c229bc85c67a43f41595d0e9e828e3 SHA-1: 2a860051d05069fae748be85163496c67b5c271a SHA-256: b14a9cab76b119bf8b05443ef35e930a4fb977816e2fd89a084c3536878f354d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it's used as a lure to redirect users to potentially harmful content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748d09c8935---kafajadesibunovakerur.pdf In PDF document text
    • http://plncse.hu/php_data/file/73728034104.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/66198202101.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/vujewitukifumok.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6c874a9lp61f2gnh3n7n8t2kub/52239048668.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/ginenurajej.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/dikesuwajigunimuwuw.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609465d96c32f---92746274299.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210617030038.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/ludemetojemuneloripujili.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/5f9bfea6ac2c21877f6b1e4858cb7ce8/48609908009.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/43739834176.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/48f1ee5eff9324e56333ff305c21ac24/gezadosuf.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/nanufanububizesopeganir.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/nugezosanilezixatulewole.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/1650396024.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6cae196de---60430374163.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/limeritunizadazugezesu.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/wobaf.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606e29c90f853---36517773337.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/08456d76a804a73e46596de096fb40e2/daxetopudumudunuramijipad.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/muund189tketjp3of4u87t6k5i/mamebego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=doa+walimatul+hamli+pdfPDF 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_off0000b5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C3 17704 bytes
SHA-256: 36ffb9f5c7289e70e38407931e4f6a519d965d51a868ce56e7a67ca50c5d8051
font_01_sfnt_off0000e2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000faca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACA 10444 bytes
SHA-256: f5c65d4edbcf6e0575265a10d9c85dc4abd891348b93fe81d41507a827e64ba1

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