Malicious PDF — malware analysis report

Static analysis result for SHA-256 4879986bdd4e39ac…

MALICIOUS

PDF

75.3 KB Created: 2021-03-27 19:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b0568610b8c153c10a0bbb20e4c0065 SHA-1: 2ce27a714b37295321f19cb4bdcdd24bacb8695b SHA-256: 4879986bdd4e39ac61f31381ea461f929ec93f74ebdb8edead5190112e9843e5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest an attempt to deliver a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=bodyguard+movie+naa+songs+free
    • http://lazategomid.scienceontheweb.net/arithmetic_formulas_in_telugu.pdf
    • http://fidumanodabimor.22web.org/geometric_sequence_formula.pdf
    • http://mufexamuxino.iblogger.org/tekizav.pdf
    • https://cdn-cms.f-static.net/uploads/4485576/normal_600a8f49df3d4.pdf
    • http://gexopidikimo.mygamesonline.org/79065133025.pdf
    • https://cdn-cms.f-static.net/uploads/4410186/normal_6026f66a29149.pdf
    • http://afracheat7.xyz/organic_chemistry_acs_study_guide9qxon.pdf
    • http://komaxinatobofe.medianewsonline.com/madonigowituvexarurejixu.pdf
    • http://copyright-services-us.com/3954176110990a3i.pdf
    • https://cdn-cms.f-static.net/uploads/4447647/normal_6033801732609.pdf
    • http://wuwudikosegukem.mypressonline.com/60740790656.pdf
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5ffba52c62b7f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_e6a69203278346a0ba2846d3e9dd1b75.pdf?index=true
    • http://jabodegodonirad.atwebpages.com/32436180170.pdf
    • https://s3.amazonaws.com/rutufokedizon/android_10_beta_for_oneplus_7_pro.pdf
    • https://s3.amazonaws.com/nazekisigiduz/book_report_forms_for_2nd_grade.pdf
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_a9f7ed646cb94de8a25bcae96073fa7f.pdf?index=true
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_7da10a2e08514d3c9129a120d1375004.pdf?index=true
    • https://s3.amazonaws.com/lanaladu/lessons_learned_database_excel_template.pdf
    • http://rofepezanevir.epizy.com/apostila_curso_de_violo_completo.pdf
    • https://s3.amazonaws.com/tonemakopinibem/3913957515.pdf
    • http://kepipejesa.epizy.com/57427357339.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70f.bin
7fc3b626430ed9a04b1bfed8f6ebbe742b743960e455b356faf42116afa157cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE70F 5404 bytes
font_01_sfnt_off0000f971.bin
910595fb1b681ff5cfa9ba1284dfbde737b9ef9f5b3cceb14ff449b1602d19cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 11388 bytes