Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef878647bbb5e5cd…

MALICIOUS

PDF

42.4 KB Created: 2020-10-07 14:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c531b5aeafe601027a86f8348b4a9290 SHA-1: 20356081a5aa84c9f8fbde7c9dce4f0d02b54e8a SHA-256: ef878647bbb5e5cd133ac6ce5de35493aa108bc1488b5e2bb335f452cd2b389e
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://ttraff.com/pify?keyword=drill+to+win+pdf+download+free In PDF document text
    • http://remoje.jessicayeermt.com/uploads/1/3/1/3/131398232/getuwar-wudek.pdfIn PDF document text
    • http://files.hopedealer.org/uploads/1/3/0/7/130739924/05111415623d.pdfIn PDF document text
    • http://files.livewellwithkell.com/uploads/1/3/0/7/130739456/ditowosuwifamokereta.pdfIn PDF document text
    • http://files.graemation.nz/uploads/1/3/0/9/130969430/3717731.pdfIn PDF document text
    • http://muguna.unad.agency/uploads/1/3/0/8/130814338/43bddc67c3.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/gurotiletaraji.pdfIn PDF document text
    • https://site-1039959.mozfiles.com/files/1039959/fosefopukonixilame.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/mevolerili.pdfIn PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/45940500212.pdfIn PDF document text
    • https://site-1036730.mozfiles.com/files/1036730/tufimagosewiz.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/29cb196d-1990-4ce7-ab3e-938b23690364/kopunejimefeses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e937a5-c96d-42cf-8a32-66ac12e33dcc/mufum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fbf6f72-731a-4294-aaf7-a86ea6386e7a/defufajezefuveso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4be5997-3efe-494c-96e3-71b49cc2b9de/48234024058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5eb1a27-d8d8-44ca-b527-2b6b2d53b812/bedez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74867a78-566e-4c83-bb4c-7e3772a2d128/sadosig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ca521b-b3fa-4db9-92a7-5d5ca7574e9d/wufewajixanazivaxajatebeb.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000641c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 4948 bytes
SHA-256: 249e922f2b706ddbfd75d60ca2025dce6cdc3ec4c9c51d591a9ce71c3ca52104
font_01_sfnt_off0000751a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751A 12184 bytes
SHA-256: ddc113e64c8195ffe04f7f0bd4acfbf317fee2ee8adf0396fa95726fed935acc

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