Malicious PDF — malware analysis report

Static analysis result for SHA-256 a800dcf56ccd8ba2…

MALICIOUS

PDF

67.1 KB Created: 2021-02-11 08:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 19c56255aaf7fd84a727d5598845e5f4 SHA-1: 2680283f44c76cafcf19f2e8f6a0942c5c3bdd9c SHA-256: a800dcf56ccd8ba2ff9e38224fb838446c54cde4ece7dbbfc2a9b9412186f045
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF_URI heuristic specifically points to the URL 'https://bologen.ru/wb?keyword=macbeth%20themes%20word%20search%20worksheet%202', which is likely used to deliver a secondary payload or redirect the user to a phishing site.

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://bologen.ru/wb?keyword=macbeth%20themes%20word%20search%20worksheet%202 PDF link annotation
    • http://wuwisometojone.66ghz.com/feroz_shah_kotla_ground_delhi_pitch_report.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/ghDicS7/tiny_soccer_3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/2gdiaAZ/87484339314.pdfIn PDF document text
    • https://cdn.sqhk.co/sorifalemuj/jeRjcjj/25458410741.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/cIJxj9F/nitro_rc_bubbles_in_fuel_line.pdfIn PDF document text
    • http://leqqurint.online/verivejitafiset3vlec.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/pgchet5/matrix_4_oscars.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/kelukakeb/barbie_games_free_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/sawevapigugosemegaga.pdfIn PDF document text
    • http://zorogeloma.epizy.com/missing_number_worksheets_for_first_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/boisterous_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/asana_premium_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/cardinal_points_worksheet.pdfIn PDF document text
    • http://xetixeguxiji.epizy.com/46873837390.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_off0000cb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB50 5580 bytes
SHA-256: bfd718e4dd5baeed977c1697ae96df381cbc704c28a3935ea6516835ad60a53a
font_01_sfnt_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 9640 bytes
SHA-256: c89fcaa504a114633f25e60ccf45cda390cd118f1636dd852f2448a055d03e6d

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