Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2dc341279f3f056…

MALICIOUS

PDF

76.3 KB Created: 2021-02-18 23:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52381ce82c0096f4945ed03f4564065 SHA-1: 261839d1c96336329dfbbd2e6707ffc4f8348e15 SHA-256: a2dc341279f3f05634f8e1c0c6ddf623e583656eb43a30eb1664e52753b102aa
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a phishing lure, disguised as search results for educational content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the embedded content suggest the document is designed to redirect users to malicious sites, 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://jacksth.ru/wix?keyword=henrico+county+public+schools+early+bird+math
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/95a937e647264.pdf
    • http://7gusevshop.website/eternal_card_game_deckssx6p3.pdf
    • http://idealicaufficiale.website/kapegofefo0565y.pdf
    • http://chatik85939775.fun/cost_value_reconciliation_in_constructionkqyw7.pdf
    • https://tetejinuditobig.weebly.com/uploads/1/3/5/9/135973847/3014758.pdf
    • http://roflan.site/free_games_download_for_pc_windows_8idj2c.pdf
    • http://brumbum3.xyz/closest_smith_s_marketplace_to_mek5szf.pdf
    • http://kadipesiwixovil.22web.org/school_uniforms_should_be_banned_essay.pdf
    • http://tourist.fish/msc_computer_science_entrance_exam_question_papersqt4au.pdf
    • https://tojemiwavujiguv.weebly.com/uploads/1/3/4/4/134468879/44f03f2.pdf
    • http://olymptrade.buzz/adding_and_subtracting_matrices_worksheet_kutah1pab.pdf
    • http://select-get.top/visual_studio_code_xml_formatting9qptl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/metubevozisul/emp_attack_survival_guide.pdf
    • https://s3.amazonaws.com/dalava/capsulitis_adhesiva_2015.pdf
    • http://lonelogu.epizy.com/lomeburemugivupexoj.pdf
    • http://lezebotetojezaz.epizy.com/frontline_commando_game_old_version.pdf
    • https://s3.amazonaws.com/towakog/area_of_regular_polygon_problems_and_answers.pdf
    • https://s3.amazonaws.com/dusubonifu/nukugovuwabarexirijuxelo.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_off0000ed55.bin
7105e594dccdb1516ef625a097759910f945f7364e4268d5c90445c877ddb9b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 5516 bytes
font_01_sfnt_off0000ffe5.bin
e38c49ecd53db7623e346fabb9ed63f7c43834424826cd44fce0d7faeabe6916		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 10340 bytes

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