Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d1c9f3e94c0867…

MALICIOUS

PDF

78.2 KB Created: 2021-03-27 12:28:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6a8826eac1c39b86af6792e0d90a8ec5 SHA-1: dae83266984b450cead035e2c50ebccac96b54c0 SHA-256: e8d1c9f3e94c0867a890ed6236d7b3322408b1404dfa1044003be3753fa6c55f
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://soxebez.ru/award?keyword=abelardo+castillo+cuentos+completos+pdf', is flagged as unknown reputation, while another, 'https://s3.amazonaws.com/bezutu/minecraft_pc_terbaru_2019.pdf', is confirmed benign. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of embedded URLs and the overall structure point towards a phishing or malicious content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=abelardo+castillo+cuentos+completos+pdf PDF link annotation
    • https://cdn.sqhk.co/dibirolinu/YxlicRo/kedufisomaneb.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/6M1jijf/tron_lightcycle_disney_world.pdfIn PDF document text
    • https://cdn.sqhk.co/nepopagugela/jhhdPAw/kozos.pdfIn PDF document text
    • https://cdn.sqhk.co/voravaxa/ggMZthg/negolabivubiterumi.pdfIn PDF document text
    • https://cdn.sqhk.co/lipisedopila/jeAZhbl/neo_bomberman_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/fhjjbhj/vomudomega.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/bezutu/minecraft_pc_terbaru_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/170fb992-e635-4446-a456-78b56e7c04c7/battery_tender_junior_800.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_7eb8d002e05344838dc8b179be34571e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c9d1d3-7524-4bb5-add4-e27f7010d65e/42799986476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a967df-3ef9-4746-8e9f-d73e614524f7/12631864044.pdfIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_71a278a6569741eea4e343e093c44991.pdf?index=trueIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_791bbad2ab634d2b8e62c55fc7486eba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b6b4ad-b477-4576-bca2-96c696c088b5/lodge_cast_iron_recipes_for_chicken_pot_pie.pdfIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_71109f0b9fee4d3bb1d355ff9ebdc72e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/lanonitasinovupude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af8b7ab6-3d4b-4d5a-81cb-104b4cf8a6ac/dositodalalavol.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/64696526969.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_off0000e182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE182 5312 bytes
SHA-256: a496dd842aaefe3e5d800681995f1f7309cc297198ac91cbaef38a3ab7168801
font_01_sfnt_off0000f36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36F 12364 bytes
SHA-256: ef991967bd0442a10a20f32e7eb4a57421c42db16d3395f12ea242d89ac32b08
font_02_sfnt_off00011bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.