Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8f52826c3e1318…

MALICIOUS

PDF

40.1 KB Created: 2020-10-15 21:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b419305420b5d6f52df0be025c302f69 SHA-1: 66f060cb10d35632263a4f17c67cd7eb98e06806 SHA-256: ea8f52826c3e131804ae8f81ba9ff7bf9ad0de5e8550e3e88a2b1009bbbd7bee
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://ggtraff.ru/123?keyword=storeonce+6600+admin+guide In PDF document text
    • https://site-1038421.mozfiles.com/files/1038421/26765465959.pdfIn PDF document text
    • https://site-1043880.mozfiles.com/files/1043880/nekabe.pdfIn PDF document text
    • https://site-1041090.mozfiles.com/files/1041090/25372017091.pdfIn PDF document text
    • https://site-1038669.mozfiles.com/files/1038669/vapowilut.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/guleje.pdfIn PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/wemukediriwabawu.pdfIn PDF document text
    • https://site-1043055.mozfiles.com/files/1043055/star_trek_fleet_command_guide_crew.pdfIn PDF document text
    • https://site-1038749.mozfiles.com/files/1038749/98184083872.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/9856162.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/1003721.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/wegedarekon_zixaluwifaxuves_muwobefakufixi_gitogezumi.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/89b828a71fe48b.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/fakavugufoner_wezod_mudegujidefub_rewekup.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/lekoxutawaf.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_off00005e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 5448 bytes
SHA-256: 4184a6981c2662379438afda401760dc5fc4299c92ea59e2bd42b5f9d57859be
font_01_sfnt_off000070c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 10136 bytes
SHA-256: abc9c12e3e94f0e5bc5c0fd2971fea75547fb088f689be875df088fa048ddab4

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