Malicious PDF — malware analysis report

Static analysis result for SHA-256 98923f45f50a0a98…

MALICIOUS

PDF

65.8 KB Created: 2020-10-15 01:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c1c65aa36c43a8956951d7d049e203c1 SHA-1: aa7b477caf584eab07bb2a265e7c91bd654ce95a SHA-256: 98923f45f50a0a98c1c7e5fcc7a6336107c94b2ef379118719d226e715b3eb28
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/strik?keyword=scooter+attack+katalog+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f87056412921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8779f175708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f877ada13e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f876da87d8bc.pdfIn PDF document text
    • https://site-1039861.mozfiles.com/files/1039861/90401662635.pdfIn PDF document text
    • https://site-1039634.mozfiles.com/files/1039634/xilenatojulezupatevifofi.pdfIn PDF document text
    • https://site-1043755.mozfiles.com/files/1043755/pogizada.pdfIn PDF document text
    • https://site-1040613.mozfiles.com/files/1040613/lovoletowobup.pdfIn PDF document text
    • https://site-1042541.mozfiles.com/files/1042541/lukejudaluse.pdfIn PDF document text
    • https://site-1042978.mozfiles.com/files/1042978/58059415483.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/vabos.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/fb304e27-5ab9-4ddb-b8ec-3c377bada800/92682150112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28163992-e98a-4e5f-8c88-6625cd8590ca/80238753133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3915da99-318c-4e33-bfb8-a1ac8d613d63/13864042866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d801932-c849-4da3-bf14-882cf09fff70/dexopivelemupapiwamobokuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/chemistry_unit_1_test_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/42448611064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598e802a-3089-4b04-8864-0f809607c7e0/womotumon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f274a9-f076-4d0d-8947-937bd00bfd5c/lesonegovefevupasogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98bb27ce-b96d-458b-8f2e-b533765de16d/nogijekujofujukalagakanaf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA28D 4944 bytes
SHA-256: adfb1bf1dd9e62171325a882fb357abfa8bc2063216fd66171184fe60a2498cc
font_01_sfnt_off0000b36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36D 10164 bytes
SHA-256: 7db17afd579ae3d2c0b879200ec9f29e5e17ac9bfe6b1b3b069cf50645ca0eb2
font_02_sfnt_off0000d632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD632 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off0000eb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333