Malicious PDF — malware analysis report

Static analysis result for SHA-256 9590df3feba98b4a…

MALICIOUS

PDF

46.4 KB Created: 2020-10-15 12:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 397e1f9eaae8d25ca25ff69f80e294f3 SHA-1: be8a460564b1be2098a5064586524f463fc7e412 SHA-256: 9590df3feba98b4a781be82d6914dbba82e21609d46cd87edb20540170667e51
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://ggtraff.ru/123?keyword=mpl+pro+mod+apk+download In PDF document text
    • https://site-1044146.mozfiles.com/files/1044146/sasagudak.pdfIn PDF document text
    • https://site-1043770.mozfiles.com/files/1043770/lazuxuvewepokonevudeg.pdfIn PDF document text
    • https://site-1042670.mozfiles.com/files/1042670/ruvuzitekekatuzebos.pdfIn PDF document text
    • https://site-1043316.mozfiles.com/files/1043316/1756580479.pdfIn PDF document text
    • https://site-1039283.mozfiles.com/files/1039283/jiguk.pdfIn PDF document text
    • https://site-1041851.mozfiles.com/files/1041851/79397567249.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/28771280263.pdfIn PDF document text
    • https://site-1043169.mozfiles.com/files/1043169/2568370007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f87e10ec41a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f87861bd422c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f87c209e43ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f871262f2c72.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/142fdcda-1636-4f07-bfb1-6a6906dff7ce/20987767492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cca0c7d-b0e3-4fdb-a8c6-97d3038333c8/natokubasopejepigijar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3b6af3-d7c4-4e25-a210-faa237c5c34b/nigafiwuviguziriti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043420f6-3d24-46e3-83b8-3f12bb69ec28/13665011933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f558a9-9ab1-45ab-a1fb-b7ab793598c7/vurezazuxajaluzugivale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2dbdb1-1c71-43d5-ad26-de1f01ccaffc/zaboxezifidolewubosisuzud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef24940-1bcf-4342-a6e8-57ca69d897d1/tojobedur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6890aac5-d7cb-4833-99b1-1cf00e8f4d91/zekozukixikabixizibov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1682/8581/files/64243058411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/feburitudizowulabuzabubap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2719/1737/files/identifying_linear_and_nonlinear_functions_worksheet.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_off000077e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E1 5088 bytes
SHA-256: 1f5c6e171d1a8af3a5e4e7e8f538fb642b3544d6a2c8d660cadc1310de16c4f2
font_01_sfnt_off0000892a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892A 10128 bytes
SHA-256: ab4661569a72874d6cda1a8c8d955095d0cca5dda8813a7a5654d6640e97961a