Malicious PDF — malware analysis report

Static analysis result for SHA-256 c988121f1123d0bf…

MALICIOUS

PDF

69.7 KB Created: 2021-02-21 04:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 34d327c30ea24ededd119bcaa6abc537 SHA-1: dfafef53e62f80787686f2c3836bbc4985f4b894 SHA-256: c988121f1123d0bfe529daabb686785e64c973cb33e52837cd92f562da5ec092
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'seumenha.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'grammar english rules verbs'. The presence of embedded URLs and the overall detection by security tools indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=grammar+english+rules+verbs PDF link annotation
    • http://datinge.site/55432465497uvoe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5ff6bda30acee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5fe550f872beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_601f735d657c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_602071695d9fd.pdfIn PDF document text
    • http://trenketo.buzz/durabelexog17qyq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotazuvibidok.epizy.com/animal_science_worksheets_for_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/google_maps_platform_credits_for_nonprofits.pdfIn PDF document text
    • http://wibitatazureb.rf.gd/pay_scale_for_cloud_computing_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/39007439458.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/beebeep_3._0._9.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/tepefexenemugunusudafaf.pdfIn PDF document text
    • http://romamosok.rf.gd/wolevoroxefu.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/21338821931.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/sapagewasataxozakiseva.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/gifufavirevupiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/rote_counting_1_20_worksheets.pdfIn PDF document text
    • http://fisugefeka.rf.gd/63809411425.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_off0000d3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F8 5328 bytes
SHA-256: a48b4463609824e1a3a061fe7a6976ff7ea4a817463c4985b3f6b230cae0262d
font_01_sfnt_off0000e5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F5 10556 bytes
SHA-256: bd7d277f9ac428d65875f66f63cd84dc1911685d54f31f04cef1e51ecfa13995

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