Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dce84d0431c9f2…

MALICIOUS

PDF

134.5 KB Created: 2021-08-27 17:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1634ffec2decb0b5a561116ad4ec675f SHA-1: 1f3e78a35322335f07256d0ef64521e425324359 SHA-256: 06dce84d0431c9f2150a6fbbdc82f64150f3f08bb3064cf80badeaed0d80d2a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm intended to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to direct users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc988c6471---10254802501.pdf In PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/28623990853.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608421cba8783---sevake.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/0bke2gb6v8p7523kef4an5hun7/83243115435.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5628c84012---mezesabajezile.pdfIn PDF document text
    • http://e-sportis.com/images/upload/1150036961.pdfIn PDF document text
    • https://pubs-icfas.org/icfas_new/dev/ckfinder/userfiles/files/38986259626.pdfIn PDF document text
    • http://dgjst.com/upfile/file/foveviwuxuvukixa.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/41573528119.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161082048774ec---poxinamivi.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0a820f8920d2b829bd6fedc00eab1cd1/zodekowexa.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/eaaaefcecdffa075d4fe4ce0026ea350/96409319921.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/kh9tjv1p6t6deoojaa3k8ftitg/zupazavodogu.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/99550757923.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/1465198391.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/ledof.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/latupoxapupufodozakusu.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/c6c6b390435d27c30271d8c56d07ae14/94204341707.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/telakuxerotaf.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021628212765592.pdfIn PDF document text
    • https://preciseenergygroup.com/media/29578190444.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/satunazusuresijofavejuk.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/sidaluzuluvifotavilobi.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/76444623949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=raspberry+pi+cookbook+for+python+programmers+pdfPDF 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_off0001a89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A89A 18124 bytes
SHA-256: a1fda104f4e8d0290b443e1d72a88d1d6b4a93a0a7d7c89264717a1ff22d8f09
font_01_sfnt_off0001d823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D823 11412 bytes
SHA-256: 7cf5e5fe96af1f96bff8a19831bd04c7b0ca436fc0ed7aa9fc50f1012e11b96e
font_02_sfnt_off0001f288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F288 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1