Malicious PDF — malware analysis report

Static analysis result for SHA-256 25771d58c2be2287…

MALICIOUS

PDF

85.8 KB Created: 2021-03-27 20:22:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f31d5c1b235a3e8a22a90ceae158d3 SHA-1: d170fd5ebddd43c405494f7de6b59782b84e9009 SHA-256: 25771d58c2be22876134956223e0055eb6b11c5a194e19c83d4c05866254062e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself contains a URI that likely leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/wix?keyword=leon+blanco+en+peligro+de+extincion+caracteristicas
    • http://gewarum.66ghz.com/standard_chartered_email_address_format.pdf
    • https://cdn.sqhk.co/jivonaxadu/zgfQwsH/33219366861.pdf
    • https://cdn.sqhk.co/livulopo/fEoBJxa/jutenovin.pdf
    • http://sewiximafa.22web.org/competitor_analysis_matrix_template.pdf
    • https://cdn.sqhk.co/tomubozes/beFihha/cooking_master_boy_watch_online_free.pdf
    • http://topukovatawosu.sportsontheweb.net/34186162084.pdf
    • http://wegoluxetas.scienceontheweb.net/61607443180.pdf
    • http://pirunumilusarib.sportsontheweb.net/83834016298.pdf
    • http://wazasutosas.iblogger.org/iksar_monk_leveling_guide_p1999.pdf
    • http://tafiwon.mywebcommunity.org/biodata_format_hd.pdf
    • https://cdn.sqhk.co/wefadegese/iCnwaym/short_stories_in_english_for_university_students.pdf
    • https://cdn.sqhk.co/gebunemif/cghAggT/wallpaper_hd_naruto_iphone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zalinejogimi.rf.gd/39323170823.pdf
    • http://beninoduvewer.epizy.com/ethiopian_amharic_fiction_books_free.pdf
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_6fdc12cec67f49a288074af894e16bef.pdf?index=true
    • https://s3.amazonaws.com/sikuva/feasibility_report_meaning_in_english.pdf
    • http://kitomalisufed.epizy.com/what_stimulates_the_central_chemoreceptor_cells_of_the_medulla.pdf
    • http://tuzuxutetug.atwebpages.com/rokavavi.pdf
    • https://s3.amazonaws.com/jivamubug/functions_of_nouns_worksheet_with_answers.pdf
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_0be7696132374fa2b2da5bd1de3acf58.pdf?index=true
    • http://pejefovad.epizy.com/20255695702.pdf
    • http://bizosubage.rf.gd/14607140279.pdf
    • https://s3.amazonaws.com/dowavelaxam/luxej.pdf
    • https://s3.amazonaws.com/jevelel/jubivofusuguvu.pdf
    • http://vapedefomagejev.epizy.com/cpctc_proofs_sheet_a.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100a3.bin
4c7d4f16753ea3a603ae484ccaa928cc8c83f1aebced7a1aabb4fa741d97e496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 5180 bytes
font_01_sfnt_off00011244.bin
f31bfe9db3e38f0517bfe52fc0e448973143dc5768ec1a3dc1b5387dffc19c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11244 12040 bytes
font_02_sfnt_off0001392b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1392B 4324 bytes

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