Malicious PDF — malware analysis report

Static analysis result for SHA-256 083eb58700adcaf3…

MALICIOUS

PDF

75.0 KB Created: 2021-02-18 18:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5db1cd26ffdd113c05876e7eeb120f8a SHA-1: cf8248e92aca80a5806f66ddecef90ce6a15f315 SHA-256: 083eb58700adcaf33a0bca19c193f4b77cc3444b883a6a03fc94a4b354ffed17
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://baarspo.ru/wb?keyword=how%20to%20build%20your%20own%20homeschool%20curriculum', which is likely a lure to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious resource, likely for credential harvesting or further malware delivery.

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://baarspo.ru/wb?keyword=how%20to%20build%20your%20own%20homeschool%20curriculum PDF link annotation
    • http://salopkisa.website/33380927446jtwci.pdfIn PDF document text
    • http://im-marceting.site/tmnt_portal_power_pc_review0pfbs.pdfIn PDF document text
    • http://ibkreactiva2020.com/90131865245wi78r.pdfIn PDF document text
    • http://com-copyrighit.com/74673240614k9clk.pdfIn PDF document text
    • http://natlegend.space/command_prompt_commands_windows_10plda9.pdfIn PDF document text
    • http://everydayy.fun/bumblebee_piano_sheet_music1o3bf.pdfIn PDF document text
    • http://shoop-fm.ru/smith_s_hours_north_ogdenqenx7.pdfIn PDF document text
    • http://winoraama.space/40705282404d6m4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuremekewema.rf.gd/92445253296.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/51945419924.pdfIn PDF document text
    • http://xelinekevob.epizy.com/56355250132.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/30569161276.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/texaweto.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/arma_3_server_files.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/38215987193.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/banjara_punjabi_full_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/cute_baccho_ki_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/b._ed_online_form_2019_delhi.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/tapuxiwosodusepapiluliv.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_off0000e884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE884 5264 bytes
SHA-256: ba8e2fff7f8811d8fc025f810f038b9c5ff6e7abd81805bd892eb8fa07dbb87a
font_01_sfnt_off0000fa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA53 10580 bytes
SHA-256: 9e2f38ee81babf9629fdeda9d264b4f51be8f5787491130d98be9ef380ad92f1

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