Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9d1ed6d31f9f36…

MALICIOUS

PDF

45.1 KB Created: 2020-10-23 12:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 03ccdc95e38131778600113be6efa5b8 SHA-1: 5ad16d84a3adc259ff208b5e01911d23bb7baf87 SHA-256: 6a9d1ed6d31f9f36971682a802a23dca8556090e05f50e9b746b77b9d7c2190c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://cctraff.ru/123?keyword=merge+pdfs+in+acrobat+reader+dc In PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/be3867667aa6.pdfIn PDF document text
    • https://mijelowiwiloz.weebly.com/uploads/1/3/1/1/131163856/wufivatuw.pdfIn PDF document text
    • https://mazofowi.weebly.com/uploads/1/3/4/3/134312703/c305daca8a47.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/5870d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f9242efbe730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f8a710431ae6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5f8d57f02a555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f8b9069148fc.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/sogejaxini.pdfIn PDF document text
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/e6dff994.pdfIn PDF document text
    • https://buvusujekigipo.weebly.com/uploads/1/3/4/4/134453925/5869368.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/4384628.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/08ff2635-1c93-447b-91e2-52597f5990db/62433372530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a1b9ee-52ff-427f-a856-c6108183c934/liwamefumazogozopekuxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d2aaaf-14c3-4e95-be64-e34fec8c489a/60968552303.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/astrology_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/physically_based_rendering_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2c532e-2d32-40d4-b8f9-fced8b133578/4745396377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e45067-450e-4050-9184-2e2e021c3d82/notawenowub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6070a368-e104-4a84-9afe-a87bb616ade4/julikasinonotunemow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4f2e1c-edb5-42f7-a946-7762d6e9ddd2/le_salaire_du_sniper_texte_intC3A9gral.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62ED 5224 bytes
SHA-256: 27568662d77dfcf610c4f0623902dca2177ee8f7a1f91566cd383b447ef6919e
font_01_sfnt_off000074be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BE 10820 bytes
SHA-256: 96207cafef36e5c848aaee3d1696660f91c857b65848d01ec34e5577a4c7d65c
font_02_sfnt_off00009901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9901 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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