Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bded89a4dc4395…

MALICIOUS

PDF

69.2 KB Created: 2021-09-29 02:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd200c1c93d16307b5e2236a7de0852a SHA-1: 48ecb6cba7921e5213e4da1641cbb940fab14c0e SHA-256: 00bded89a4dc43952367377612fdf2e57a4fa03656c1b59fab362679fa977e66
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest an attempt to lead users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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://oniceh.ru/uplcv?utm_term=how+reset+motorola+phone
    • http://kayapaliinsaat.net/file/batan.pdf
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/98717467938.pdf
    • http://dfwsedan.com/nbloom/fckuploads/file/64875023990.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d6c29ce9e0---zerorujiwonosuj.pdf
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/jilesumopupabizuloxo.pdf
    • http://commandhousecreations.com/uploads/files/28039230792.pdf
    • http://onsijsselstein.nl/userfiles/files/sovubuvisuvogarunuzi.pdf
    • http://krasneclanky.cz/uploads/99522322007.pdf
    • https://rotterdampools.com/contents/files/63921201043.pdf
    • https://lexcyberia.com/userfiles/files/venikesovofosito.pdf
    • http://ambcavallon.eu/userfiles/files/56913572872.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ic2pp1quikt7asun4341k812do/kavin.pdf
    • http://naturabliskociebie.pl/userfiles/file/bexagive.pdf
    • https://ismet.com.br/ckfinder/userfiles/files/virakakulaledumubedojaj.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/5279c91295e37fe5147f8e25de606127/pevekeguruloge.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613764f9e0767---27887891040.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328299a8eb5---viwafikatuvuduneb.pdf
    • http://sahrugs.com/userfiles/file/luwijupevibovobawobovowo.pdf
    • http://vinhomeshaiphong.net/app/webroot/img/files/43038979547.pdf
    • https://djecijagarderoba.me/userfiles/file/bibigepurojesal.pdf
    • http://jandenzobv.com/image_uploads/file/rexebaxujuz.pdf
    • http://betonkeritesek.eu/Content/files/difize.pdf
    • https://ayurmitra.com/files/file/87378466912.pdf
    • 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_off0000af3e.bin
80a84b4aca46358ae8fb3f90f1de32a301bddfeed65cf53bb6c7ae59404aca30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3E 10500 bytes
font_01_sfnt_off0000c700.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC700 16792 bytes
font_02_sfnt_off0000df12.bin
a567b896e68cef7493ea4acb45904c5527c033c1c3e1305c1e9e58d1b7436ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 16048 bytes

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