Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9d49f6898049a2…

MALICIOUS

PDF

71.8 KB Created: 2021-03-28 06:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f9cc98cf1bce61287cb4c650f9c9e0cb SHA-1: 1981c412a309b18587099173bc4269cab34766fa SHA-256: 4e9d49f6898049a283a745015a7af994c7c487de766a68734bb12a5f21343575
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'la france worksheet key'. The presence of numerous external links, many hosted on disposable domains, indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/wix?keyword=la+france+worksheet+key PDF link annotation
    • https://cdn.sqhk.co/livejizilul/gifMLic/agriculture_college_in_coimbatore_application_form_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/3jbLhjb/best_alternative_rock_songs_about_love.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/5xDrpgj/naxakibazepevitebopenu.pdfIn PDF document text
    • http://wawovotem.22web.org/server_alice_mail_per_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_602ab8a4898e3.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/kjcSTif/context_clues_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/ixqfnXc/2016_warriors_super_team.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_605e0ab9411ff.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/Aa2gcgQ/typing_master_ping_pong_ball_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_6037513e0d7d0.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/the_selection_series_movie_cast.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/jogixedamuxanowodepen.pdfIn PDF document text
    • https://cdn.sqhk.co/bojidokagivi/dhhhbqz/xedisiteresoguf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://getozareburi.rf.gd/basic_electrical_engineering_mcq.pdfIn PDF document text
    • http://jirabasojexosud.atwebpages.com/61889744858.pdfIn PDF document text
    • http://gumuparalimej.rf.gd/penyebab_bronkopneumonia.pdfIn PDF document text
    • http://zoguwazor.epizy.com/ryobi_router_bits_guide.pdfIn PDF document text
    • http://ritarajekaxitev.rf.gd/30099025015.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/windows_10_command_line_cheat_sheet.pdfIn PDF document text
    • http://wutobonedurovit.rf.gd/xejuso.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_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 5136 bytes
SHA-256: e13bb8b6b9995acbc90a3158e23fac68d8a3983088f13962d0ec40a688f9b22a
font_01_sfnt_off0000ee91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 10852 bytes
SHA-256: 53c516860456d22f37b7171ebedabb2f0071f4494197ae005821298781753a05

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