Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8667576816bcbd5…

MALICIOUS

PDF

72.7 KB Created: 2021-02-23 03:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2cb9fe9ca056046ba267239cfe72962d SHA-1: 1e6b6705c075ffc7933b197102f1ce5387d22902 SHA-256: e8667576816bcbd5ff99335714e0c8e4772add3c3b27c1df07dc377c1ac2bbb2
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to 'https://maypoin.ru/strik', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a book chapter title, indicating a potential lure.

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://maypoin.ru/strik?utm_term=how+to+tame+a+wild+tongue+chapter+5+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495240/normal_60268f354d1f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458125/normal_5fdad17144ae6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427506/normal_6008a5dcbda76.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/aijjajj/wileduvuliriwafaviduliwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425256/normal_5fee27c461ff9.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/cheicgc/world_market_campaign_desk_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/gdifcjc/18169602931.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/QtejjSn/siren_head_the_game_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494432/normal_6001e412b94ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_6032c9cd67435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_602d8e3bb76a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500667/normal_6006ff83c7440.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/lorifumofelu/can_you_hide_report_folders_in_salesforce.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/b._ed_cet_2019_application_form_bihar.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/53856850469.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/xbox_360_error_status_report_code_list.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/5e_monk_way_of_the_four_elements.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_off0000deae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAE 5764 bytes
SHA-256: ca72b53f93a5cacd134f0420d9a6d995d3f71a0bec1751e8ff3bc57a9d3a83f8
font_01_sfnt_off0000f23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 10324 bytes
SHA-256: 208924e64540a55b4193287d0e250e55f042a534c37d6e840dd7213a372237e7

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