Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d3e93960625b4a…

MALICIOUS

PDF

42.1 KB Created: 2020-10-12 06:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 09680c5ea4197e571382f050c4db384a SHA-1: 62cb6cf542e41d8049ce991c0a330b164513c906 SHA-256: 66d3e93960625b4af2c92da4109e7d4a6204f1422144b69586335aba12a38e24
192 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=does+diablo+2+run+on+windows+10 In PDF document text
    • http://files.themillefiorisart.com/uploads/1/3/1/4/131453220/eb2bdee592c810.pdfIn PDF document text
    • http://zalufu.hearttoheartfarm.com/uploads/1/3/1/0/131070236/289ae426.pdfIn PDF document text
    • http://files.ayasuda.com/uploads/1/3/1/4/131406735/5d913d01.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/mevel.pdfIn PDF document text
    • https://site-1039259.mozfiles.com/files/1039259/fajogozila.pdfIn PDF document text
    • https://site-1038720.mozfiles.com/files/1038720/xijapelozapaf.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/1de4a5e9-c3c9-4fc3-979a-95592864de03/77645168966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/30952291865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/answer_heating_and_cooling_saginaw_michigan.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_off000064c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 5376 bytes
SHA-256: b7d8755f489c6876a4ba1fe9c10cfde0b2331a48f5b968df1ec1db3f754fd22b
font_01_sfnt_off0000772e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772E 10664 bytes
SHA-256: 6687af36884d6c647e64dd647151855a49801f850a9d44475c8b9efc9f3042f7