Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa65d2434bf1e69…

MALICIOUS

PDF

68.0 KB Created: 2021-06-08 18:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5b2afee3e65fb36b81f113edbe1669ad SHA-1: c26e83f1e78db1a7044af128b572555203437c9e SHA-256: 1aa65d2434bf1e693fc4b46d3d8c9fda1a9a373e393a069b81cb05986105da24
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.3860

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
  • 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://coretry.ru/pbw?utm_term=flame+test+for+metals+lab+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379844/normal_6033eb9da84f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_6046c05f571cd.pdfIn PDF document text
    • https://mebenemezozu.weebly.com/uploads/1/3/4/6/134689881/2603383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501509/normal_60621adf12a1a.pdfIn PDF document text
    • https://dawujorukola.weebly.com/uploads/1/3/4/6/134683436/xavirugasabud-guwenur-bivefipiwore.pdfIn PDF document text
    • https://pozetegafikule.weebly.com/uploads/1/3/4/8/134857311/447f0de8ae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393209/normal_600483b4dbfbb.pdfIn PDF document text
    • https://sixupotivene.weebly.com/uploads/1/3/4/3/134305687/siwudifojolura.pdfIn PDF document text
    • https://vixoketos.weebly.com/uploads/1/3/1/4/131453026/nowewoxotifibebuguzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_604cd439376cb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4406191/normal_60afff853a69c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_6047266390fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_6066edf67b3da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_606b98fc5f82b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411231/normal_6000273b41a5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d19b3f9-08de-4996-ad8e-c4939fd97c0a/pdf_libro_despertando_al_gigante_interior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f76c76-416b-41b7-af6a-2a51639334f3/76721205187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c481de-5be8-4f84-853c-6b436f22c371/basic_accounting_terms_for_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f63469-5bbc-449a-90e2-84592c01ddd9/what_is_first_order_and_second_order_constructs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f64be00-b8da-4a50-b30f-87caca25bb84/what_is_the_goal_of_the_legal_system.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144590832/black_desert_mobile_witch_gear_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb8768b-fca8-47b0-9486-a18aab6ed49b/what_oil_in_4.3_mercruiser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a55aa39-ab44-455d-b17c-9b7fe92f6767/gta_3_psp_highly_compressed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba01a21-6043-4c07-b5e8-5cfd2668422e/dev_c_guide.pdfIn PDF document text
    • http://poguvovuk.pbworks.com/f/wizowup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9a84f4-fd3b-4130-9900-6a863eaefed5/86823046138.pdfIn PDF document text