Malicious PDF — malware analysis report

Static analysis result for SHA-256 0924c3449a248df2…

MALICIOUS

PDF

41.3 KB Created: 2020-09-29 22:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b5799122374ffa7d8f49f1bfff7ac32b SHA-1: 4ed0babcac8209b47159c9eb2aa8aa3d62dec439 SHA-256: 0924c3449a248df27cc5b86b55d849631dd44dcc63646a8f887b7c73d4c22fd8
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://ggtraff.ru/pify?keyword=compact+flash+reader+amazon In PDF document text
    • http://files.maununezregueiro.org/uploads/1/3/0/7/130738542/2847337.pdfIn PDF document text
    • http://tuzusuri.ddowell.com/uploads/1/3/1/4/131453918/07d0b5.pdfIn PDF document text
    • http://getuju.kwongwingkwan.com/uploads/1/3/0/7/130775169/pavaduvubat.pdfIn PDF document text
    • http://files.annranderaadpottery.com/uploads/1/3/1/4/131453897/5351809.pdfIn PDF document text
    • http://files.naturalme4c.com/uploads/1/3/1/4/131438330/nogigef.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/zoxidawaf.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/lukaxufogado.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/nevekumo.pdfIn PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/darepab.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/buwejazubotapefupakele.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/kosizupuzepo.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/10318943135.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/zumatik.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/kolen.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_off00006469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6469 5352 bytes
SHA-256: 04a637b571a3d68021c60dfc1ec8f4bd9e02e42bd7d6cd6be9132d0a6f19bb5f
font_01_sfnt_off00007670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7670 10136 bytes
SHA-256: c435a35bceeb6d5049f2a7e80bcc9b163d7b8f9da4fe4a0348ef95a7a317b376