Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ece85262535ba0…

MALICIOUS

PDF

67.6 KB Created: 2020-11-26 07:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7b87d180d9e8ad24572b29bbe1c4b210 SHA-1: 6b4792ecad525b820f5433be563c156f67118b38 SHA-256: 63ece85262535ba0847aece4a1e021154d91c599829d1e9395209a7941bcb019
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to 'android apk' and 'wkhtmltopdf', suggesting a lure for potentially malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=ff7+android+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fb265eca8340.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/fapolurefo-dubofibojarotof-kezefenobudijix.pdfIn PDF document text
    • https://mosuzikovadapa.weebly.com/uploads/1/3/4/6/134667275/wutuw_digefus_pisusafen_wijolozoxaka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/bagging_and_boosting_in_data_mining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf92b591-0f99-4205-ace4-4d8a618cb4fa/kibokevuzikefawu.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/lvmpd_police_report_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76ffafb-db8f-45b2-aa0b-02eb9a580afe/40948290498.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/27800648260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f3e7b76-95ac-469f-8e51-1eebc239ecde/fundamentals_of_applied_electromagnetics_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f362a41a-8c97-4021-9ac9-e57d6e596046/70704487819.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/mogibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf8a8ca-8762-4c71-a833-cbb24f689477/depois_de_voc_livro.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_off0000ca77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA77 4924 bytes
SHA-256: ea07f6f4e405e353e6695c05ed3788a36efad119df2c7f03a6a5ee2e69819dca
font_01_sfnt_off0000db59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB59 11628 bytes
SHA-256: fbb31c2f5ee05f2fac629f575ca2054591f827b0b8ebf9236c2d5376fc38641e