Malicious PDF — malware analysis report

Static analysis result for SHA-256 07397e05eea54f5c…

MALICIOUS

PDF

87.6 KB Created: 2021-06-26 01:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2db30babfbdd8636b8e2b991ebca8474 SHA-1: bb3c4b75128298ca0e246b7f0105d3a0e1cf748f SHA-256: 07397e05eea54f5cef23638519eb2dbe67fd15439b77397368125e4cf5fce155
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and PDF heuristics strongly indicate maliciousness. The document contains a link farm pointing to numerous domains, many of which appear to be compromised or disposable hosting. This suggests the primary purpose is to redirect users to potentially harmful content or facilitate SEO spam. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://katachizu.com/img/news/files/galesimiza.pdf
    • http://beautybybelief.com/admin/images/file/wekisujuweluninuse.pdf
    • http://humanitool.ru/userfiles/file/potinido.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b1a72584---24104704271.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/528235bbb5ad4da09231b4076f4f257f/24018915872.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d0f04d74588700211d78e433dc03d4d/75294235271.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a440febe6aa---zazetadudegoxi.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889aaac028e---51814425606.pdf
    • https://daismene.it/file/patesebizuziluvipovakekex.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160855a7a49da5---fitavuwu.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/e3141690496c160de93956795fda0835/83089020864.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/b1ca7f2b0cd9abe4fcc723e440cc9574/68347584043.pdf
    • http://flatadministration.com/uploades/fckeditorfile/10362963043.pdf
    • https://ludifrance.fr/userfiles/file/18568559512.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/qpa46a2d8r9lcsbeo6ftghb3sr/57798975334.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76b79dd8e8---ziwaranelapikeb.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/73c030e5a1f0787750634cc85a68aceb/10762523052.pdf
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/84894162809.pdf
    • http://zbraneklapka.cz/ckfinder/userfiles/files/mewumotuzibewot.pdf
    • http://fapannimario.it/userfiles/files/lemuvozujifafotapoberoro.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741e2fa14d6---72604691663.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/colch3jfa7usjqo1l2tsggbf05/tabisakudinasuwafato.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/a48a9d0ae56637bc382e748f3130d41a/zexakop.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=quotes+about+teenage+driving
    • 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_off0000f310.bin
7f1063863b34ae617cdf5052ba373ce99fb558ba8300003dd7eba42412414c27
pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 10744 bytes
font_01_sfnt_off00010bda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDA 16792 bytes
font_02_sfnt_off000123ec.bin
7eb674f8b100c647fe8d554933f09c700ed62f78999e8c36c3da780eac2f5931
pdf-font-stream PDF embedded font (sfnt) at offset 0x123EC 16816 bytes