Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f54d4ae4f44d0d…

MALICIOUS

PDF

49.6 KB Created: 2020-11-07 10:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7ea879bac928f69ecba95711a7b85b98 SHA-1: 919231102206893d0e6487b7556b131d3d4292ff SHA-256: 72f54d4ae4f44d0d4c158f6ed328ca1fbe071f13a48a13852a9d817f85198b44
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=clothes+dryer+repairman+near+me+08742 PDF link annotation
    • https://ziwoleraxen.weebly.com/uploads/1/3/4/3/134385658/4e1f2e8.pdfIn PDF document text
    • https://pesadosopovito.weebly.com/uploads/1/3/4/2/134235692/boxexogitem-wurivugukebu-pilamexupitow.pdfIn PDF document text
    • https://mikudone.weebly.com/uploads/1/3/4/3/134370159/zipunaji.pdfIn PDF document text
    • https://gunulavosaki.weebly.com/uploads/1/3/4/3/134374607/9bb585c7e1.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/df2d17c.pdfIn PDF document text
    • https://gejuvidafi.weebly.com/uploads/1/3/4/4/134456396/01ea07c29789b3.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/843e560d01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://sirilab.files.wordpress.com/2020/11/sonuve.pdfIn PDF document text
    • https://denuberoram.files.wordpress.com/2020/11/guitar_tab_blank_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf9631a-2ce7-40ac-9c9d-e378239597e4/taegukgi_korean_bbq_house_san_diego.pdfIn PDF document text
    • https://lusolewipeso.files.wordpress.com/2020/11/98265057697.pdfIn PDF document text
    • https://sirilab.files.wordpress.com/2020/11/popimevukel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000750f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 5748 bytes
SHA-256: ef953f2326c829e296136236c1fcd09086c4ef9e665bf6b688436261d9ab8a95
font_01_sfnt_off00008889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8889 10084 bytes
SHA-256: 8c37c4c5b180f9b50149a5aa4ce5c423fc0685a0ed5f0b979a74df857f3bd9cd
font_02_sfnt_off0000aafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAFC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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