Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ff1e02f36722c6…

MALICIOUS

PDF

39.8 KB Created: 2020-11-08 01:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 79fc2f9e85fea649b8d82a879577842e SHA-1: 9620da6e61a273aaf24153e5b949cad5f93b01d4 SHA-256: e6ff1e02f36722c6428c8dd8f6858061d1c0ec10d6fe960c798a2ae296e426ad
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://trafficel.ru/aws?keyword=google+translate+english+to+korean+free PDF link annotation
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/mijiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f92579bde713.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/3e3f00e9db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450337/normal_5fa6ea585cfd4.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005c51.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005c51.bin)
    • https://gozevawu.files.wordpress.com/2020/11/birthday_invitations_free_templates_word.pdfIn PDF document text
    • https://jasobegofur.files.wordpress.com/2020/11/3354134121.pdfIn PDF document text
    • https://xexazogiloxa.files.wordpress.com/2020/11/tekobunuz.pdfIn PDF document text
    • https://napawun.files.wordpress.com/2020/11/empire_total_war_torrent.pdfIn PDF document text
    • https://gozevawu.files.wordpress.com/2020/11/tanufupavurogazevuzekuxi.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://danuxowifoka.files.wordpress.com/2020/11/97926079603.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/goresosuvufat.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 extracted file (font_00_sfnt_off00005c51.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C51 5124 bytes
SHA-256: b5f280cf9cd9db5042e66cd5f8fa5d6124fd1bef2a430de2d499645df6de6746
font_01_sfnt_off00006dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBD 10808 bytes
SHA-256: e88601a32a46b9339718f45b75a5427c5d3c538c06ab6d4d547f929f28d93cf0