Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ef081a5e899332…

MALICIOUS

PDF

51.2 KB Created: 2020-10-25 09:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9df9bb47b312520aa757d63acb7072b8 SHA-1: 8dab4535648b7f36fb8b3260e6229f26c7d2b4d1 SHA-256: 66ef081a5e899332aec86c9b6c21954361e55b3720f4d319520d5953170c2148
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/aws?keyword=amikacina+posologia+pdf In PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/wokute_motudazireporut.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/suvivuvif.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/7342046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f882adcb20d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f894be7f0601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_5f93dd1e0a4ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415537/normal_5f94af8b4546a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f8df68569dcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406777/normal_5f9341000602b.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/8b2901d9.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/nesejapepop_wazetorapiloju_dogonik.pdfIn PDF document text
    • https://jigupipugefelo.weebly.com/uploads/1/3/4/3/134387822/mezerobusifof.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/21fbe111f5c4ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008a4a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008a4a.bin)
    • https://uploads.strikinglycdn.com/files/d349668f-ade6-4bb1-ba37-8ae28e19a899/60638748306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be029673-c9fb-48f4-b3d5-e1ba6b4534a2/fezagisukimolujijovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68573789-91eb-47f5-b4f4-19e1267ca614/the_mastery_of_self_don_miguel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39614dcd-4465-44c6-b277-8d9bcebfad6b/daston_galison_objectivity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67a9c13-c1cf-47fe-8d92-eb8aa5299780/27465976740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e64400-5c91-4ae4-9811-a8baeb90fda1/nawalezovefogewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b287fec-ec45-4a37-9e70-6d1527407bac/zukupowavudimup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8769e465-0088-4641-bd02-6e938c82676a/vesixefatalexukoxobobu.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 extracted file (font_00_sfnt_off00008a4a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4A 5432 bytes
SHA-256: 283c787d49c2c9184d8f205556cf7c368c06c8ab301cc1c2dd0fb2b2f2aa1b23
font_01_sfnt_off00009cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBB 10132 bytes
SHA-256: 241bec40c6c7729db68758c53d09ac01c65cfd099dc16cc4d14abd95e5a94e27