Malicious PDF — malware analysis report

Static analysis result for SHA-256 6733c83f2d9b63b8…

MALICIOUS

PDF

79.6 KB Created: 2021-03-07 00:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e6224546b55cd7d23e07defa4e9cadb8 SHA-1: 483dfb44e71a2f68cb9dfa9c2ea5f8120e599cec SHA-256: 6733c83f2d9b63b8133d052148fa7c56ac3144998dd728008d838d571056c569
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=sniper+assassin+3d+hack PDF link annotation
    • http://siankaanmexico.com/jibuburezolitoninifug7i2a.pdfIn PDF document text
    • http://bluebadge-support.com/rutagemumorenofivuxurs4b5i.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/cjhbFib/vekiwezojusozeb.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/NwhhiG2/79991338813.pdfIn PDF document text
    • http://sale50.pro/597812401079lczy.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/weider_total_body_works_5000_home_gym.pdfIn PDF document text
    • http://uptodate.site/anaconda_machine_learningcj4mq.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/CQhh6mD/fishdom_deep_dive_gameplay.pdfIn PDF document text
    • http://naremegefo.iblogger.org/procurement_specialist_job_interview_questions_and_answers.pdfIn PDF document text
    • http://iqecoportal.ru/871478945159vs7c.pdfIn PDF document text
    • http://milanbeachs.space/microsoft_publisher_torrent2bg7o.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/zitamipi.pdfIn PDF document text
    • http://peuer.xyz/26788371157xxiuf.pdfIn PDF document text
    • http://suzenax.22web.org/appreciation_certificate_design_free.pdfIn PDF document text
    • http://wildboost.club/foliage_report_vermont_2018wifld.pdfIn PDF document text
    • http://zemegazi.22web.org/what_is_the_official_harry_potter_house_quiz.pdfIn PDF document text
    • http://gexifivavipi.iblogger.org/xaxatekutanasiviserug.pdfIn PDF document text
    • http://design-kvartira.info/miracle_9_edge_control_reviewj9h1p.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/46745552247.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/7lihi61/jiwogemonada.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/45UjhPP/jeguvipuvesonemotovoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tujukiji.rf.gd/video_boboiboy_galaxy_episode_18.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_0378dde7c5d54cdcad79a0b17dc79ff6.pdf?index=trueIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_90437eb366bf426fa770eb498aaab460.pdf?index=trueIn PDF document text
    • http://likutolejit.onlinewebshop.net/drawing_line_graphs_worksheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 5056 bytes
SHA-256: 592fa42fc1a5aa57db8bb66a2a0d48724f6684499a32cbf5baa195966458f178
font_01_sfnt_off0000fbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF4 11540 bytes
SHA-256: b27fd586d626cb26bd06819883b3922144dc3e2844cdebed029f6bd69884c228
font_02_sfnt_off00012298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12298 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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