Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fa1d9a70e304b2…

MALICIOUS

PDF

53.1 KB Created: 2021-03-27 17:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1554ff8b765dd312f3e479df8418b6e0 SHA-1: 03926a2c7a0e911f9d844a48a5a73603dfa88eae SHA-256: e5fa1d9a70e304b2104f574cb5312541a5afe02a2e7464aa046affd512d342a7
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8574

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/award?keyword=the+source+for+aphasia+therapy+pdf PDF link annotation
    • http://tijukilebag.getenjoyment.net/lagisifoxapanuwo.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/66276040751.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/alternative_renewable_energy_sources.pdfIn PDF document text
    • http://figejewumoposes.getenjoyment.net/pekidemukixigenusu.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/47853497264.pdfIn PDF document text
    • http://dowafirowelumex.atwebpages.com/ketibepi.pdfIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_cea7216e0c6242c1852187d398fa0000.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_853b9af2fa034c45b690b61116f61e7f.pdf?index=trueIn PDF document text
    • https://c534e673-b245-4a6d-8787-855fe96db707.filesusr.com/ugd/e19215_d73a5fcef5a947b090b7310de4918635.pdf?index=trueIn PDF document text
    • https://bc13a564-db4d-4abe-bba9-081b1c4085ef.filesusr.com/ugd/d5ec75_9ed7a6a2516e496aa12efa1d58a6c4ef.pdf?index=trueIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_bfa1f86d22bd482cbbaa0ed0358c8e76.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_5b9242e7203142f7a5e70c2a22aeeb4f.pdf?index=trueIn PDF document text
    • http://ralirajuz.atwebpages.com/avril_14th_piano.pdfIn PDF document text
    • https://43466d02-873c-4564-b63c-f2f79aa6d38e.filesusr.com/ugd/fd64e8_055a7086f3ed43058e637309da4a28b9.pdf?index=trueIn PDF document text
    • http://muvamubas.atwebpages.com/el_anarquismo_frente_al_derecho.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_576bec04f19d4d7f88edfbbff309b6e6.pdf?index=trueIn PDF document text
    • https://dd67658a-cc17-4e1c-bca5-42bf299a485b.filesusr.com/ugd/07a440_3bf51d5e7d254014b2ae792b0d7304fe.pdf?index=trueIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_4f59d0f1264746c9b496239689a6cf63.pdf?index=trueIn PDF document text
    • http://nejimafalun.onlinewebshop.net/kitchenaid_mixer_k5ss_repair_manual.pdfIn PDF document text
    • https://76c87692-cca9-4651-be8e-de6412dad411.filesusr.com/ugd/fdad67_3787e38e15b64e28ab4b07a49dd3fcd1.pdf?index=trueIn PDF document text
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_58a01005e03b42d7ad56cc825e37cfeb.pdf?index=trueIn PDF document text
    • http://najexenij.onlinewebshop.net/puditikowuw.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/88126185382.pdfIn PDF document text

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