Malicious PDF — malware analysis report

Static analysis result for SHA-256 76415cf56362e5b7…

MALICIOUS

PDF

107.5 KB Created: 2021-03-30 23:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e496916701ef5162dd8b124b8aa7d4a5 SHA-1: 00f89974456ac51c8358786bb57d2557d819122a SHA-256: 76415cf56362e5b7c0fd62edc1e12d9e33533a53baf26e03178f2c0cf6ef0e3f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'isotopes definition chemistry pdf'. The presence of an external URI and the ML classifier's high confidence score indicate a malicious intent to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=isotopes+definition+chemistry+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fc68cb1893b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_600ebc0201bf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_60531e4028626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_605523542a92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_602064e6496f1.pdfIn PDF document text
    • http://bomawowaziwan.iblogger.org/88952135662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_6054dd0a7eb48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_605f9da7abfeb.pdfIn PDF document text
    • http://jaligovaw.iblogger.org/zoxaresovifulowo.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/ropidadegaxut/illium_maplestory_skill_guide.pdfIn PDF document text
    • http://rasijubesu.epizy.com/carmageddon_tdr_2000_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/balancete_de_verificao_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/crosstrek_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/boxing_game_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/what_are_the_dimensions_of_a_washer_and_dryer.pdfIn PDF document text
    • http://fariwugakek.rf.gd/47532785734.pdfIn PDF document text
    • http://refubexat.epizy.com/dnbi_report_army.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/45517141986.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/45967446442.pdfIn PDF document text
    • http://wufutogaj.epizy.com/7020713559.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/cctns_full_form_in_marathi.pdfIn PDF document text
    • http://logedulon.epizy.com/abcd_telugu_full_movie_480p.pdfIn PDF document text
    • http://wogokafen.epizy.com/53643898779.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/affirmative_action_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/symantec_antivirus_for_linux.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_off00015518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15518 3004 bytes
SHA-256: 5bd188872015ca8803adf7b209a88ce055b6e52038f6a3168c90703ba8b64869
font_01_sfnt_off00015fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE3 5192 bytes
SHA-256: 6b8e193ddb17918fb856efb1d44c000c36b4949733a9f7871998fd70fa4ea3f3
font_02_sfnt_off00017176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17176 14904 bytes
SHA-256: 7b095bc003d41e5b652b8940baab41fe18fdbef933b2f65c5e09fcd77c3a729a

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