Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3a5d8bad19589f…

MALICIOUS

PDF

69.7 KB Created: 2021-05-01 12:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6280aaac13eb3f2ad0175cc989a1ae89 SHA-1: e6b49f15b74dea4542e0e4762bb2e67a29211d46 SHA-256: de3a5d8bad19589fe8950ffd9c34c4365fac90bb77c946d605748b9baf42d9b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as redirects to phishing pages or malware download sites. The document body, though heavily obfuscated, contains metadata related to its creation, suggesting it was generated programmatically.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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
  • 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://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/6rfp5dnl14v0m6515q0pp1u57r/fosiwafimobod.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7a6b85376---pibitagakidalatevediwise.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/0bb6362c5e067a784a46835ccf13acd6/delonoxekifexa.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083aa947de45---felonaburimumexa.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/c763287ed27b876512db165faf28c1ca/95286953972.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607270a3d10bb---tuxowerivuseboj.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16076f3ed6ef32---niseka.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/957c8e17973ece4ee1435116f28380c2/figuji.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160793d0778b78---xorudeganorafodij.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/2quuva0kll10c1bd9mk8g4at97/tipawivisuzose.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712081426e3---25149004252.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/53760de876a45a69988c6b8c83067b16/82881398988.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/e528fd9ee305ea683fe6bb396dd7f800/18135445522.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/n2j0glg5b5jlov17a212q6g2uv/10106382376.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0737327bb---xawuwajudoludedizo.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/77751fb4d1fae31ed308265a32e13e46/sixibuganivum.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/d170cf907475aa7e59bb788d2e255363/xokebozudazubago.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/o4j30lj5dnaks45ihiuehlrmvq/16516939398.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=bicycle+dynamo+working+principle+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df38.bin
3805bf6e52ef8099d6c8554959d6cf95deec800d8010083cda76cb810a2bfb41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 5604 bytes
font_01_sfnt_off0000f25e.bin
4b249d66a24a33ffae00c60f84eba5d678084accef1d199c6278bfeb2ea5e8b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 11112 bytes

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