Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b310d098ee4e891…

MALICIOUS

PDF

78.4 KB Created: 2021-02-19 02:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e4eda738244d11e5ef5c3a6eb47443d6 SHA-1: 0d4fc771cbc8e3b99cd095e7a0fbd9a3bc9ad8c3 SHA-256: 5b310d098ee4e8913f1b29958e0b23f33e712a38c2546e41382ce5756fbf282a
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://jottigo.ru/wix?keyword=ut+austin+short+answer+examples+major, is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to academic search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=ut+austin+short+answer+examples+major PDF link annotation
    • https://cdn.sqhk.co/vibisimak/ejejbjc/destiny_summoner_mod_apk_0._5._12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471474/normal_5fc5703675d0b.pdfIn PDF document text
    • http://losinglotterynumbers.com/creepypasta_amino_apkv7usq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_6025ef8448b28.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/Lgf4njh/sekokolegalumuleda.pdfIn PDF document text
    • http://lightly.store/alarm_clock_apps_for_heavy_sleepers_freep1g2r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_600f7bdb7939b.pdfIn PDF document text
    • http://buyfastedcircle.xyz/vuvoperi0jy35.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/aplikasi_whatsapp_web_escanertri7m.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/tonemakopinibem/official_curriculum_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/xalobufe.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/fesizarulevanus.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/amped_wireless_sr10000_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/jivubapukakimazerimadid.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/gothic_calligraphy_practice_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/dukoxilabelukofekol.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/gazinisatifekutovevagani.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/compilation_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/77111341989.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/multiple_choice_cloze_exercises_with_answers.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_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 5288 bytes
SHA-256: 8eaf9510330c0ab09bd305eb80e2c80d9df2166548199206a6270081ada4396f
font_01_sfnt_off000108d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D6 10420 bytes
SHA-256: d40be2d915795764ff5ef511d44e7c2999ff33eb51d1cff8c5e105149c64ed5e

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