Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fa0eeabd7f9b9f…

MALICIOUS

PDF

77.4 KB Created: 2021-03-14 22:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 141956aee7af57b5d039a4b6ba98f3e1 SHA-1: 37734eb015b59f7877aa329e63d778a8ffce9d78 SHA-256: 35fa0eeabd7f9b9f1f2adaae2f2d266ab142f28cf736e305e1aa48184a5a17e3
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains text related to 'browardclerk.org pay ticket', suggesting a phishing lure. The presence of an external URI indicates an attempt to redirect the user to a potentially harmful website.

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://mezovuduw.ru/wix?keyword=www.browardclerk.org+pay+ticket
    • https://cdn.sqhk.co/zonelatu/hjSibhd/bit_dungeon_2_apk_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4372373/normal_5ffe7d9f8189d.pdf
    • https://cdn.sqhk.co/rufosopufu/a0hibid/best_s8_ringtones_wallpapers_app.pdf
    • https://cdn.sqhk.co/kuxazigozo/aeBhdxB/sports_3d_games_download_uptodown.pdf
    • https://fajasorefasox.weebly.com/uploads/1/3/4/3/134348900/3629743.pdf
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5fd2dc4080c9e.pdf
    • https://cdn-cms.f-static.net/uploads/4394077/normal_603e45af8bf74.pdf
    • https://guvixiwek.weebly.com/uploads/1/3/5/9/135976323/c17263129c2f05.pdf
    • https://dazarurizupe.weebly.com/uploads/1/3/1/1/131164120/zefovitubajalito.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_f66ebd7afcc349a4812a8eabebeb2280.pdf?index=true
    • https://s3.amazonaws.com/lusabifef/dental_assistant_resume_cover_letter_template.pdf
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_1c58b585883f488b80bd998969c19628.pdf?index=true
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_2c1f6f3b5a84440ea4f793bfc72a6d57.pdf?index=true
    • https://s3.amazonaws.com/vazisi/android_1_play_store_mod.pdf
    • https://s3.amazonaws.com/jadere/ropedovosibekosososi.pdf
    • https://s3.amazonaws.com/woxotopapozokev/403154520.pdf
    • https://s3.amazonaws.com/dogazisuze/3979676514.pdf
    • https://s3.amazonaws.com/nerugiraxura/poetry_analysis_worksheet_doc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef59.bin
2319a94d2b6fe614f453fa80194a9f3155bfdf20403239bd5a44fc5a761c5c51
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 5508 bytes
font_01_sfnt_off0001024e.bin
28ff0f9d4ff5dfb51412562cf49ff686fbf17eb3aa02f4e8091eb4f6afe5dd0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 11268 bytes