Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9540f9c33f7ad68…

MALICIOUS

PDF

79.2 KB Created: 2021-06-01 08:39:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 14c6a4d295319165c8f79a008a34a7a0 SHA-1: 7b6b97f14e011a19cd85d92fdfcb98a086e766ab SHA-256: e9540f9c33f7ad681789bf9856d8780a3b9771793d5fc5bc413c45a41acb32f4
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicative of a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://wastran.ru/pbw?utm_term=formato+para+certificado+medico+prenupcial PDF link annotation
    • https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/jajusufebovu-teredalepanur-dexamifawuj-zulixodepam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_606e27eedd559.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5fdd3ef079d6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482631/normal_5fde84ae1f1ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_6006beadcb8d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_604c9ad73b542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424378/normal_5fc615972f33a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5ff92e550ab8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5fe11ecb56802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_606a673ac4c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_603e949c3603a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477878/normal_600133f14e419.pdfIn PDF document text
    • https://xefolulewonud.weebly.com/uploads/1/3/1/4/131406676/996357.pdfIn PDF document text
    • https://sifovepemu.weebly.com/uploads/1/3/4/3/134373157/tununoro_xinitam_jutoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_6036201d73b13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nikekuva.pbworks.com/f/cells_and_their_organelles_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be007a76-4f0d-48c1-8c7a-439fb90bcaf7/sims_3_pets_3ds_decrypted.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144418785/ib_biology_course_book_2014_edition_oxford_ib_diploma_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7428bea4-c81d-4e4c-add0-9394bfb85676/nazeduzatarefezesugog.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/descargar_dragon_ball_z_budokai_tenkaichi_3_para_ps3_pkg.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/how_many_combinations_with_5_numbers_1-45.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/40031736624.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_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 5080 bytes
SHA-256: 852083a95a6dec0d7dee923a4069820805c7da71fa574856ed2da647704d0aca
font_01_sfnt_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 11908 bytes
SHA-256: 2b607fa91e112ced34074e262de7a089d4ac9fddd0101f07698425da6ed6eef1

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