Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e1ff5b391b1386…

MALICIOUS

PDF

82.7 KB Created: 2021-04-12 05:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 97a06905b8a63a60933dfa5dc16941f5 SHA-1: 609d3f9c75e53c628264c6af09fe441af6857e61 SHA-256: 02e1ff5b391b138648da4cdaf6d1044022c1976a75a9cf5c95d8afc8f959088c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable hosting domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to direct the user to potentially harmful content. While no scripts were explicitly extracted, the overall structure and heuristic firings point towards a malicious document designed to lead users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://bologen.ru/strik?utm_term=movie+review+worksheet+for+high+school+students+pdf PDF link annotation
    • http://shopyou.online/vijasurutarusetolob7cwxt.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/g6L8jai/98707977001.pdfIn PDF document text
    • http://panuxidoku.22web.org/vijimijutorenefekukoravo.pdfIn PDF document text
    • http://tilosag.mypressonline.com/76566222773.pdfIn PDF document text
    • http://persequenteamsohbet.com/522300661950e310.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/hhcTyvX/3d_brick_breaker_revolution_download.pdfIn PDF document text
    • http://1s.london/aatrox_guide_u._ggriq2u.pdfIn PDF document text
    • http://jelesanu.iblogger.org/20386471018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5fce68e0de53b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_6068bf7556778.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/EoBZIhi/jipoga.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/rukibax.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/livazatafogebif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_60118b2796c19.pdfIn PDF document text
    • http://afracheat7.xyz/27319754515zz6q8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vinegufoxa.rf.gd/xelisunusodeveripadat.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/adolf_hitler_history_in_tamil_free_download.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/definition_of_business_research.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 5428 bytes
SHA-256: 4806469131e3f9dc5136caa2cc27593f0898081e279560ee77308023965500d3
font_01_sfnt_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 11636 bytes
SHA-256: 7cc32a654483b1a4d65319d9f6fb7e5e521fb4508f82dd536c90e072a973bbea

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