Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbe01d70b986c71…

MALICIOUS

PDF

81.4 KB Created: 2021-09-19 10:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6741d771338c0068483afd65b1d959c1 SHA-1: 017cc10d4995750a54607ef7a79a819fdfc2de4c SHA-256: adbe01d70b986c71fde742412f0db8f481b6127ec0926b379a2215f1f6364a09
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, with numerous links pointing to various domains, many of which are associated with file hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, aiming to redirect users to potentially harmful content. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest a malicious document designed to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • 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://ffarchitettura.it/userfiles/files/rozolufaguwewirit.pdf In PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/36527481468.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/34148076731.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/44075797107.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/maxipagevejojimexadifa.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408ba46c03f---nazovo.pdfIn PDF document text
    • http://canadanur.com/resimler/files/sivaban.pdfIn PDF document text
    • https://penzion-palice.cz/content/8055183914.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/88664513329.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/dosevemoxerane.pdfIn PDF document text
    • http://cartopack.be/Images/file/57569912929.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/komokuvado.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/geweja.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f84cec79e5---nifiwigewalomajujala.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/99427510247.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/fanipamavoraki.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/73551409651.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/26277961447.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/banuraputesitizejunonevav.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/dopelomowebisijorod.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/sewiwope.pdfIn PDF document text
    • https://felicityokolo.com/file/52140951500.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/4541076701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=download+machinarium+mod+apkPDF 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_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 16872 bytes
SHA-256: e4d58ddb78d60af19864abe902f9dc11ee59e805186d8e903cfead3b185d0f74
font_01_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F69 10660 bytes
SHA-256: b2e80bcf42e304181722eb9fda90de42455c03ebaa3c584efef9e69d9c30539c