Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd985fd30e1ef42e…

MALICIOUS

PDF

75.6 KB Created: 2021-09-03 08:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11b558db97040a7f0900dddef35c51d8 SHA-1: 03aaf1119b7d9e5ecf30c0d97341a77709d273f7 SHA-256: fd985fd30e1ef42e42e32aabe62f6c4bea4b48dd181066f2b1f5de20dbe51200
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aiswaryamatrimonials.com/fck_uploads/file/xukub.pdf In PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9009377b07---65897351635.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/20307969504.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/rumesawafavezagarubu.pdfIn PDF document text
    • https://ebooksweb.net/files/file/buvenesebumob.pdfIn PDF document text
    • https://hse.tw/upload/file/fejevizumalegekog.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/54666583066.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/782b900a6ce6897d50bdab3d349038f4/26241052861.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/tosexisatapifaxu.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16087550bed346---90953595799.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/70542429483.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad14340136---tegofijuma.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/funikuruzususawatemug.pdfIn PDF document text
    • https://anfauglir.com/images/file/gamozabuxukil.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jibolirezevuzabexewotike.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/xexebowa.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/6libijluu85fmck6mkjedmice7/wesebuzigonite.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6511350e1f---femufuxusabagedipen.pdfIn PDF document text
    • https://alternatifhosting.com/calisma2/files/uploads/55021660162.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/tonabeluwadir.pdfIn PDF document text
    • https://service-panev.com/userfiles/mupawewowedireja.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/3ff48985d9e27014b70c30e439346a78/mexaredewiv.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/14246882016.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/safemati.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/dc030725bb0acd29364638dabdbb5525/filatojemuwekazugawafij.pdfIn PDF document text
    • http://isvpro.com/custom/files/jadexekowobejerefujodisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cybex+700t+treadmill+manualPDF 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_off0000c104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91B 10780 bytes
SHA-256: 0fdc2ff6db03cd8e1f9fee46a41b9cfe850e9b1b2a40acf6d6ef7576eb235831
font_02_sfnt_off0000f1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 17572 bytes
SHA-256: e49a57d09922378684607e33972710e6ba57c85b97fcf03352b1a090639ed21c

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