Malicious PDF — malware analysis report

Static analysis result for SHA-256 d654b25afdb3b7ca…

MALICIOUS

PDF

87.8 KB Created: 2021-02-14 17:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3e6db32ae9fab281e10dc38831d7123d SHA-1: 15941ef0084682c23686ca10a760ab80ac90e94d SHA-256: d654b25afdb3b7caf7aca48ee78f5a1f456ea558bd906ad3164369b3391f8055
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=the+double+jose+saramago+pdf+download'. ML classification and ClamAV also flagged this file as malicious. The embedded URL suggests an attempt to lure the user into downloading further malicious content or visiting a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=the+double+jose+saramago+pdf+download In PDF document text
    • https://cdn.sqhk.co/tezofugowura/gexhchi/69439335944.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/UVnvOTH/66563090658.pdfIn PDF document text
    • https://cdn.sqhk.co/votexeruwiti/UXjfjd0/99429893062.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/hcTDigu/rilodesej.pdfIn PDF document text
    • https://cdn.sqhk.co/gigepiwej/jhaseNc/qr_code_scanner_android_studio.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/mjb1khj/human_resource_manager_job_description_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/Qgdyogh/infinity_sign_tattoo_with_rose.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/aAiihje/phag_o_medical_term.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/igggjcd/lineage_2_revolution_best_pvp_class_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zudatona/yWiiyih/zezivazobegikegiwupu.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/gf8KpCe/ww2_quiz_questions_hard.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://jatufivo.rf.gd/antivirus_free_for_windows_7_avg.pdfIn PDF document text
    • http://pexoroxijaseduj.rf.gd/real_estate_investment_business_plan_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/back_formation_short_note.pdfIn PDF document text
    • http://xuwunokebisul.rf.gd/bulava_teri_yaariyan_song.pdfIn PDF document text
    • http://minudumira.rf.gd/engage_ny_ela_grade_3_2017_answers.pdfIn PDF document text
    • http://vudatuvabejosix.epizy.com/great_is_thy_faithfulness_piano.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_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 5468 bytes
SHA-256: e427d596ce508817a72514e94a1aa654bccfa7c8ec8d51e7d0420bc765bcf25a
font_01_sfnt_off00011e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E24 10988 bytes
SHA-256: e92332fbc11ee906df494e461126faea3fe8626ad9af1e0fd294a0e010a2a060
font_02_sfnt_off00014373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14373 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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