Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce9c337b69977a5…

MALICIOUS

PDF

78.1 KB Created: 2021-03-12 21:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c0a3f89344ba82d433f35d85a5f1d969 SHA-1: a76842c171513bcf2930bb8dbfc9ab0437e911d1 SHA-256: 9ce9c337b69977a572d413446de2ae9282502f11b0bd5c9d033a7739b4881c67
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure, disguised as a "Tera brawler leveling guide". While no scripts were explicitly extracted, the PDF structure and the nature of the embedded URI suggest it is designed to redirect users to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/wix?keyword=tera+brawler+leveling+guide PDF link annotation
    • http://vajununer.iblogger.org/pujifij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_6035424570281.pdfIn PDF document text
    • http://nanutoz.22web.org/elsevier_journal_paper_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_60154bcb61bd5.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/71330705597.pdfIn PDF document text
    • http://gimemuwet.mypressonline.com/annamaria_testa_la_pubblicit.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/35549173371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505771/normal_600c9f50d5f94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_600b1185a15fd.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/zuguvoxoki/careful_verb_form.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/70404199057.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/32429683496.pdfIn PDF document text
    • http://kesexawes.rf.gd/avengers_main_theme_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/microsoft_sql_server_2017_express_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/ubuntu_font_free_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/9649542930.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/pre_algebra_homework_practice_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/navubagajukabiwuk.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/37590862773.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/68251820114.pdfIn PDF document text
    • http://fuxobubuwuvivil.epizy.com/12148346457.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/seven_spiritual_laws_of_success_by_deepak_chopra.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/27677145562.pdfIn PDF document text
    • http://zagopemolal.rf.gd/android_os_update_support.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/adjective_and_adverb_phrase.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_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 5056 bytes
SHA-256: 47b0156b75323b050843631c6c549edd22bcc23b4b524800afe6ada53825196d
font_01_sfnt_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 10624 bytes
SHA-256: 1175c1cc964ad44474e4cc755f166b0c8410ab3a02d75b34cfb0db07617b3340

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