Malicious PDF — malware analysis report

Static analysis result for SHA-256 363077e1d3cf6716…

MALICIOUS

PDF

77.1 KB Created: 2021-02-24 20:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b61d13e1f91b7fc8ce124113a70e0dca SHA-1: a333545a3fb875b10ea76af40fe13607521b818b SHA-256: 363077e1d3cf671618c472a17d1dc49cb8b7325a8acff4a1f4325ce029a90ee5
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification and ClamAV detection, indicating malicious intent. It contains an embedded URL pointing to 'jacksth.ru', which is likely used for phishing or to download a secondary payload. The document body and metadata suggest a lure related to a 'Brother pt-p900w pdf'. No scripts were extracted, but the PDF structure itself is suspicious.

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://jacksth.ru/strik?utm_term=brother+pt-p900w+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5ff43101f1ddd.pdfIn PDF document text
    • http://nat-fru.space/29484254234geooe.pdfIn PDF document text
    • http://skidki-day.site/general_electric_annual_financial_reportynspw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470681/normal_5fed73b5da0eb.pdfIn PDF document text
    • http://mmamba.ru/affair_new_punjabi_song_ringtoneju1je.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/wujodibu/35024573767.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/noxuvobonifemepegepinafe.pdfIn PDF document text
    • http://viladanus.epizy.com/annexure_c_form_sassa.pdfIn PDF document text
    • http://xedonufil.rf.gd/95394807451.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/desituriturom.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/character_certificate_format.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/91843519848.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/gadolevapijivolulukanuti.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/gomanidinufagegofapiro.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/background_color_gradient_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/abhimanyudu_movie_in_telugu_hd.pdfIn PDF document text
    • http://xabogubumux.rf.gd/wufoxuwubujotabile.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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 5180 bytes
SHA-256: 0a926ef0805f44a81a334caad1c7a72bfe802a611f40b60482124b69ce4cd587
font_01_sfnt_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 10852 bytes
SHA-256: ca967ef6005f1b2107da3e53aa59ba2cb9120db119d2259cb8f4ea2bbcc73180

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