Malicious PDF — malware analysis report

Static analysis result for SHA-256 e587e3663df4146d…

MALICIOUS

PDF

75.2 KB Created: 2021-03-25 08:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a600f253d30b4e9beb7ea34692bcb094 SHA-1: 7277b8bf7e2320eb903e4b27d835c12f095b59ca SHA-256: e587e3663df4146d4e4fbf041fffa9066136a17414485f98315df009e614f782
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. The PDF contains a large number of external links, many of which point to suspicious domains, suggesting it functions as a link farm or redirection mechanism to deliver malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=marion+elementary+school+shelby+nc
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/f1124b98.pdf
    • https://cdn.sqhk.co/xeposetuge/Yejvady/candy_cane_run_5k.pdf
    • https://tazomisoz.weebly.com/uploads/1/3/4/3/134344853/ziwudubixolu.pdf
    • https://cdn-cms.f-static.net/uploads/4496607/normal_605955f675a97.pdf
    • https://vibitidit.weebly.com/uploads/1/3/4/7/134712982/wufadopegop.pdf
    • https://tekovotobu.weebly.com/uploads/1/3/5/3/135319939/muvukosunowoga.pdf
    • https://static.s123-cdn-static.com/uploads/4471711/normal_5ff96f5560ffd.pdf
    • https://static.s123-cdn-static.com/uploads/4417827/normal_5ff115482415f.pdf
    • https://cdn-cms.f-static.net/uploads/4389816/normal_605122854966b.pdf
    • https://cdn-cms.f-static.net/uploads/4387718/normal_6016e2f513d29.pdf
    • https://cdn-cms.f-static.net/uploads/4499999/normal_602ddf8ca8037.pdf
    • https://cdn.sqhk.co/losiluja/iichdig/59973398027.pdf
    • https://static.s123-cdn-static.com/uploads/4477620/normal_5fcbc470d39bc.pdf
    • https://cdn.sqhk.co/dutaxato/Dji7hbq/20105544774.pdf
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/riwivero-zikirabujen-worebuj.pdf
    • https://static.s123-cdn-static.com/uploads/4459629/normal_5ffc5640159b6.pdf
    • https://cdn.sqhk.co/toxotunem/geAgija/69901346121.pdf
    • https://cdn.sqhk.co/jedugifaxido/SiiD6gj/rdr2_animal_map_locations.pdf
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5ff29717a10af.pdf
    • https://cdn-cms.f-static.net/uploads/4391335/normal_601cc43219df2.pdf
    • https://cdn.sqhk.co/tekemozuj/Xhcgj4M/vafanorotasazilokanev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_c6f2d07fc6c6465dad3023ace78ee080.pdf?index=true
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_ed7e6a5f666e40949ea2f3216ba5399e.pdf?index=true
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_8c3ea2ddc644452f92c8ebe8e4171b2b.pdf?index=true
    • https://25cf7bc6-226b-4013-96fa-c64d334b7dac.filesusr.com/ugd/317e1a_ba92923a8cfc49358b5c11d28589a38a.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23a.bin
9493376d9cf727e1884ff8949b5fb9a7577dd1244a4c68283d57c327584aadf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 5284 bytes
font_01_sfnt_off0000f41a.bin
70701c08883ea5f0d5bf3bc2347c2bdf6f4761b8d8d47504ac48f6189656a741		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41A 12512 bytes

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