Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19cbad32ae6ba2d…

MALICIOUS

PDF

49.8 KB Created: 2020-10-02 20:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b6da3208485913501db6e64e2d4ed95b SHA-1: fb602f5ba4fe73dbdf45ade011dc8fabe8098d0e SHA-256: f19cbad32ae6ba2dddc03b2bedc8300c7620c420e4edbeeea129e0aaf3e444bf
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=guitar+chords+chart+pdf+file In PDF document text
    • https://site-1040132.mozfiles.com/files/1040132/99972696154.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/99779648800.pdfIn PDF document text
    • https://site-1038810.mozfiles.com/files/1038810/93288025206.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/45347006289.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/gazojapemof.pdfIn PDF document text
    • https://site-1040131.mozfiles.com/files/1040131/jolaxedinubub.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/warutugipewowoxodotowidon.pdfIn PDF document text
    • http://boliniwew.myorganicfairytale.com/uploads/1/3/0/7/130738711/6765fa488be4199.pdfIn PDF document text
    • http://fapes.eastfallsfarmersmarket.com/uploads/1/3/1/3/131380213/govixipibituf-mibaguvanexog-zaganibuxunedo-savili.pdfIn PDF document text
    • http://files.peterjenningspoker.com/uploads/1/3/1/0/131070434/tilolav-debafuviworuxog.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/62077930825.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/3725822635.pdfIn PDF document text
    • https://site-1039911.mozfiles.com/files/1039911/dofuwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00008537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8537 5272 bytes
SHA-256: f0734d5b4f370bfa4f2115f75b0299dc681e18b663f20c2e558974801c8d0ed9
font_01_sfnt_off00009721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9721 10288 bytes
SHA-256: 34c0264c5942dcef2c4337fe638fe1885fbc6bb4ad1094c0317ff4ca33b2ba39