Malicious PDF — malware analysis report

Static analysis result for SHA-256 270a22214173f796…

MALICIOUS

PDF

73.4 KB Created: 2021-02-24 01:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 52611ba2cc70b7f17edfdef6bc512fed SHA-1: cfdf36978a69fee513a2da5728beaccdf7a453ab SHA-256: 270a22214173f79621354d93fa533bddb3996dcd8363adcf9e9f47e5bca19e80
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary lure directing users to 'baarspo.ru'. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's a link farm designed to redirect users to potentially harmful content. No scripts were extracted, but the presence of external URIs and the link farm heuristic point to a phishing or redirection attack.

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://baarspo.ru/strik?utm_term=how+many+harry+potter+prequels+are+there PDF link annotation
    • http://malapiwo.66ghz.com/mapa_america_politico.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/gc8Xaia/migawilogirizeke.pdfIn PDF document text
    • https://cdn.sqhk.co/pejibuti/gcidujc/warhammer_40000_chapter_approved_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426425/normal_5fe3a525c8add.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5ffd7a34908a2.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/bhehffu/65553772138.pdfIn PDF document text
    • http://mandarin-fruit.space/explain_the_concept_of_human_condition_before_science_and_technologytp78v.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/Uid6Kji/zavuwokufibowabi.pdfIn PDF document text
    • http://vukesis.iblogger.org/radozabularawugizupirinis.pdfIn PDF document text
    • http://artelamp.store/cetusplay_tv_remote_apkk2ir2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fd8b367cfecc.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://s3.amazonaws.com/begijufadi/fetemelavod.pdfIn PDF document text
    • http://jolavewavesuj.epizy.com/ireport_config_java.pdfIn PDF document text
    • http://nakimot.epizy.com/63581689960.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/xofemonuxorebox.pdfIn PDF document text
    • http://lamumabazekutum.epizy.com/comparison_of_adjectives_exercises_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/35994828572.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_off0000d44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44F 5176 bytes
SHA-256: 693b8bfa4e265541d5d8b1bb879a3294d4d48d33a6de1869e0dfdddc7eb51b91
font_01_sfnt_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 10800 bytes
SHA-256: 376966d6e9c365931f8eac3b904332ff1b1e5f7055a6d5449b8b5a585c936095
font_02_sfnt_off00010a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f