Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcfc29ec51fff58…

MALICIOUS

PDF

83.1 KB Created: 2021-09-09 09:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1b07dd873cb96a6c98c41144cb4f0a0 SHA-1: 828080034e6b2b239837c9e5fea5c4d890549002 SHA-256: fdcfc29ec51fff586a9e47cb12865412de98b8802b28b7aeb0242b8f1fd398d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as a link farm. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high likelihood of this document being used for malicious redirection. Although no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence score suggest an intent to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.szphotar.com/admin/img/files/jutibumofa.pdf
    • http://jongauger.com/ckfinder/userfiles/files/dojopatejides.pdf
    • http://educaholistica.com/resources/img/imagesck/files/famipufexofuluketa.pdf
    • http://szigmetal.hu/editor_up/pidulagowadewufuver.pdf
    • https://goodnest.info/tctt/sites/aaa/file/fefifu.pdf
    • https://digireg.cn/upload/zizafaganovafo.pdf
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/79114144186.pdf
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/58279387212.pdf
    • http://artepcb.com/upload/files/guwodujitemulurukuviti.pdf
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/zabalibemitokoxale.pdf
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/ketewa.pdf
    • http://gz-chengeng.com/uploadfile/files/likofuvupitaxodatogeritil.pdf
    • http://olympicburger1988.com/uploads/files/11319213603.pdf
    • http://dyglas.com/userData/board/file/rijux.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1f23a5bc2e7345419ebef9c2a694c2dd/gatonakoziw.pdf
    • http://asbu.net/uploads/FCK_files/file/juximexixuzuvajabajek.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613383738abba---benagomovur.pdf
    • https://tezerwatch.com/file/upload/files/09-01-04-14-24-80.pdf
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/44028402269.pdf
    • http://ageddfjtjgrade.pretty-match.com/upload/files/75931990205.pdf
    • https://pharmawell.eu/ckfinder/userfiles/files/basakimubemeso.pdf
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/bazuzulaxo.pdf
    • https://tivirtual.com/userfiles/file/64994271772.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=touge+drift+and+racing+lite
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db86.bin
7d2ee0918b85a3eee3233c023d87446aef9d1c255fda84866d790e7546e08a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 10548 bytes
font_01_sfnt_off0000f376.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 16792 bytes
font_02_sfnt_off00010b88.bin
0fab9e9c9160244dd4f81400b7a7cb5dc9a8649b0c9b98fdb594187b1029186c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B88 18996 bytes

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