Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6f00d717014ed5…

MALICIOUS

PDF

97.4 KB Created: 2021-09-02 06:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 30259e03c0bbbc15add6dca24ec6efd8 SHA-1: a8cbf010679e7996314e7928a2cacd392de46cf4 SHA-256: 3e6f00d717014ed58f3a9ce174ca41be7f61493b77a0eedf4b25ff52b8528149
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features a link farm pointing to compromised WordPress upload storage and other disposable hosting, indicating an attempt to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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://pierrevillers.fr/mairie_files/file/58250969724.pdf In PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b6d7e5276---lopidudumuvoduvadezeb.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/49810805934.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/9476143733.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/tafoduso.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcd2d02983---jonakitepukopupoz.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/fafupoxetoxofovujekinon.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/31469871134.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160823c986214a---nogetijamurapijar.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/siromuxul.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/45664451189.pdfIn PDF document text
    • http://agrion.org/upload/fichier/62452832927.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c46b2850b9a---92489214734.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/folapitepemuro.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d625a258c---91928684908.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/73985193525.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e352a2eb4---winusigivivokifenen.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/9dbeeccc4b44cc6f39f2e1f328fa5330/32069403503.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16090cd8995c0b---56251966226.pdfIn PDF document text
    • https://posh.hr/files/88114447232.pdfIn PDF document text
    • https://pcstaiwan.com/ckfinder/userfiles/files/vudinozumodirolulut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=300+divided+by+7PDF 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_off00011aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FC 18164 bytes
SHA-256: 09737d79eb548794a65ae819ecd74b45c96c7e9bb7f9403e36d78e7ec1f176f0
font_02_sfnt_off00016256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16256 10008 bytes
SHA-256: 285522e6e0d69bd81c428a87002944fc74e7907f9eb6e273eaae441acf4606a5

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