Malicious PDF — malware analysis report

Static analysis result for SHA-256 fade494ff45b97c3…

MALICIOUS

PDF

46.9 KB Created: 2020-10-17 00:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 16f67a360f36f1ab665b296bbeef26eb SHA-1: 00739a6bd95ba18c7f4a392345ecb6ef399ef67f SHA-256: fade494ff45b97c35cb873ac273e5d1e896a44266dbceb9031356021bf76db51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on dynamic DNS services and appear to be part of a link farm. One critical heuristic indicates that a link points to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to educational programs and the malicious URLs, suggesting a phishing or scam attempt to drive traffic to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=post+baccalaureate+premedical+program+guaranteed+admissions In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/2556250.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/d549da259ed0cb.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/finemuwisupuwa.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/9134660.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/2366198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f880686a8066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f890eee92d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f88a39a59875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f89aadf6c4ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f887fbc374b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9fc515-2e01-4642-a992-a2f89fed6b85/xijiparebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75712cfc-f0d8-496f-9eab-36a2fb87c2a5/loxuworomimis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9122f489-2e7d-4e4e-a56d-69f0612885ae/54663605856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e27c7a6-f25b-4c18-8f55-7ab37b29a1b9/sopiwimisujawodelanado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb3fbc0-0ba2-42b6-aea6-c7c1b6f5c8eb/80463043994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46496dec-d64f-4c19-8256-e9bfa655c3cf/dolerupididera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830b0832-a8b6-4438-841b-54380890187d/witilovawuperogusigef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2eb1ae-b733-41e1-a47d-48f1427e513d/pagalan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f0d4d0-e914-4ba1-8057-c691c93d7bd8/jojuxulawumamesupolixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43cff8ee-8f73-4f31-a4e3-a0ef89a1539d/tatujibibagojevida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783e7573-7075-4adc-8b3c-03a27030bbbf/zimikegekibotujabikujesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0436b9ff-a93f-4945-b437-4938b7866181/pupebojiwowovizujidorito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c460230b-776d-4e2b-9dce-b205530b643f/36905319380.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000780f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 5536 bytes
SHA-256: c7b4daa5c5a1cc45f8a124fff2c74378afd9f8a5f827ed1bf6822322ee846759
font_01_sfnt_off00008abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABF 10316 bytes
SHA-256: c4b7b0c6db23ba55ec433c15992bf5c1ca27c3c53eca271bef9d36891a46acbc

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