Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d55d4a0673ba4bb…

MALICIOUS

PDF

45.6 KB Created: 2020-11-09 03:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8de98b1f9698c757766c956fa1f530bf SHA-1: 689980c64e0ba18fab21390e9567007fca60686d SHA-256: 7d55d4a0673ba4bb01dd7c443858fab4a32efc0de10613e784bf6c0360511300
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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://traffset.ru/aws?keyword=3.2+complex+numbers+answers PDF link annotation
    • https://jiwefirufij.weebly.com/uploads/1/3/4/3/134370204/5e90ae25ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425760/normal_5f977cf66ad64.pdfIn PDF document text
    • https://velebipuzufal.weebly.com/uploads/1/3/4/4/134434208/dametuzo.pdfIn PDF document text
    • https://xetibipu.weebly.com/uploads/1/3/4/5/134528590/252d294d0.pdfIn PDF document text
    • https://guvapokasek.weebly.com/uploads/1/3/4/4/134437462/wetufo.pdfIn PDF document text
    • https://jokepalebaja.weebly.com/uploads/1/3/4/3/134360350/kekofaxijixixibix.pdfIn PDF document text
    • https://rinumobepora.weebly.com/uploads/1/3/4/3/134377952/ef59e25cdbc3db.pdfIn PDF document text
    • https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/gavatoraraz.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/206eb558-5c2d-40f3-af7b-7d215a76f8de/how_to_mobile_legends_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a088e18-5bc2-424c-ad6d-6750b712d642/suwewunisojox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bf57b3-5f42-4402-b3cd-4a5ace3a14f2/55272590502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c17dd3-b68d-4c88-b658-d13d9337d135/35280319344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2a2c51-2c52-41ff-98e8-ab424ae89bbd/mortal_kombat_1_snes_scorpion_move_list.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.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_off00006f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F84 5612 bytes
SHA-256: 7f7fb3b0d28f29927b06a389405d1ae598e0259be769286d53371b883bca35d4
font_01_sfnt_off00008290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8290 12020 bytes
SHA-256: 48f3b2ba0d44852d0f934224d35d392d0abda8ec1e6144c721b9f833f7ad2005

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