Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae05e1bc9b76289…

MALICIOUS

PDF

87.3 KB Created: 2021-03-17 22:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a037b035ebd6eed482f8245ccb3234fd SHA-1: 9267ff3c02a5b74d3c4051832661f1611952a71b SHA-256: 4ae05e1bc9b7628915653f04b7ff7519f7bd5ea754e7ebab3ef35c7f1cf2d0be
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://kuzutuzo.ru/aws?utm_term=how+to+calculate+stamp+duty+on+bill+of+exchange PDF link annotation
    • http://lovunusugi.22web.org/konigsberg_bridge_problem_worksheet.pdfIn PDF document text
    • http://madalez.22web.org/shimano_di2_dura_ace_groupset_disc.pdfIn PDF document text
    • http://you-bestshop.xyz/zawodofijidigexest81e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_604da0720dbe7.pdfIn PDF document text
    • http://nedipupuru.22web.org/free_technical_drawing_programs_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451927/normal_600267347c2f9.pdfIn PDF document text
    • http://latuha.com/cambridge_igcse_chemistry_revision_guide_roger_norrisuks52.pdfIn PDF document text
    • http://zerudomafiko.iblogger.org/star_wars_ahsoka_lightsaber.pdfIn PDF document text
    • http://perevod24-card2card.site/burger_king_coupon_mai_20189iau3.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/nafamaragisek/dmv_ny_registration_transfer_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/elektron_analog_four_manual.pdfIn PDF document text
    • http://busisaviw.epizy.com/tokopulikesosivubif.pdfIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_d65168c24c754bda9dd7a9c840888a3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/ant_video_er_para_chrome.pdfIn PDF document text
    • http://xugazilisamovu.rf.gd/character_sheet_online_dnd.pdfIn PDF document text
    • http://laguwirir.epizy.com/86450986971.pdfIn PDF document text
    • http://nadiripu.epizy.com/jumojofinawobekozanufita.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/utilitech_sump_pump_dual_float_switch.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_930d56ba61294c939156fa6e8ade8967.pdf?index=trueIn 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_off000112c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C2 5836 bytes
SHA-256: f5c6c944450ba75546e6cdb791ebbd70b4399b86992ae525bc8e109aacb0d9d4
font_01_sfnt_off0001269a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269A 11432 bytes
SHA-256: 9e093efcabba4a86ab8fdfa66856d6cd500c5694cd75b68d58b2814f332ea9f2

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