Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fd2b4b89ee0edd…

MALICIOUS

PDF

101.0 KB Created: 2021-07-05 03:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 796dc2ca75860d31dc546d22bb38dda4 SHA-1: c4e3e5aea13609129a53e92b6a26dafe2902dbc9 SHA-256: 00fd2b4b89ee0edd4d571b36d170055c2d868b7b83ad8933b21c7039fd9a1013
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm on disposable hosting further supports its role as a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 6

  • 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.
  • 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://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9506b79571---48674539591.pdf In PDF document text
    • http://morard-mcf.fr/data/Files/zadezutetorefajijulu.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf370a0954---41231480073.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210620_110104_5339.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/38119fa012040e395ae8e0e9ff07b85d/gomupi.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/68634283126.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebe242c521---79650103948.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a47f285c51b7ddbf44dbef3514c1d702/sinoxumikolovileri.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/f9d4ca4a4c18562541ccfc2b0bbdd863/7576054350.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/zejujuvekorofiwabiwela.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/608651a80d56f0e208bbf86679c4163e/13774615562.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/90576960404.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/3f1b299558d7af1a52e7edcddd7cf8be/fujuvuxuwefozilelolujun.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16083e4e33ef3f---xobewebawur.pdfIn PDF document text
    • http://dothi.info/images/files/83751518894.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/59229487990.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094b3a7950d8---52674321488.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67b557fce8---82414212053.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baf9e43f8a---seravadikola.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/jewepedalepikixilib.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/33295070574.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/13218bb6da2c4e8a3689a9fbf260ab5a/bijapud.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/banow.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/92267770528.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/rawomibajewenolalixapini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=the+ultimate+goalPDF 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_off0001282b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282B 10244 bytes
SHA-256: f31cd156c5130c26db69660a70837cf99102ca55b6ba87ad3dbb25a3ae7dfd4c
font_01_sfnt_off00013f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2A 17768 bytes
SHA-256: edff83975b5233bbcadca2e013006c5025f707c35aef2af5f190e382496d64ee
font_02_sfnt_off00016d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1