Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3264411267964d7…

MALICIOUS

PDF

76.1 KB Created: 2021-03-06 12:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4c3e14afc8e96cc11742b0db9420781a SHA-1: ecf49ed427c76594ceac563c820110a062243780 SHA-256: e3264411267964d7e20bae861347892f867ada9f5a91f34efc25d0c9ece5f491
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL designed to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The presence of an external URI and the ML classification point towards a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/award?keyword=does+arby%2527s+still+have+5+for+10 PDF link annotation
    • https://cdn.sqhk.co/bamebuxi/hbMc3hf/tinted_car_simulator_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_6028933106d64.pdfIn PDF document text
    • http://dugules.iblogger.org/chemistry_the_science_in_context_5th_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_603041d18fbfd.pdfIn PDF document text
    • https://cdn.sqhk.co/xegogeji/Teegcbw/vector_definition_medical_terms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454965/normal_60315165d3e7d.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/Phjjggx/vikings_war_of_clans_secret_knowledge_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467936/normal_5fd10db6a53a8.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/dugibabafod/30999726721.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/counter_strike_source_pc_mega.pdfIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_d0c317f5095a41b3bb6f112ed1c790ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zetituri/how_to_update_my_bushnell_neo_xs.pdfIn PDF document text
    • http://vonubopoz.rf.gd/what_is_organizational_structure_in_healthcare.pdfIn PDF document text
    • http://ligededeju.epizy.com/picture_organizational_chart_template_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/60131208064.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_4d0ac35f75f34244b7a76c961ae656df.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_1b662b69081b4ca3b12624e2097d16bf.pdf?index=trueIn PDF document text
    • http://finezifor.rf.gd/sengoku_basara_psp_android.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_0e5847fda1ed4a4cb85503868843c0aa.pdf?index=trueIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_acad3ef7aac6401b8b8689f7a0eaf931.pdf?index=trueIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_1e3c0d98f50a4d17af8ca698cfbfc458.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/blount_county_tn_police_reports.pdfIn PDF document text
    • http://fivulesesixiji.epizy.com/39927946907.pdfIn PDF document text
    • https://cefb960a-5e15-4f1c-8a60-3df6ecd7f933.filesusr.com/ugd/f84671_07bd4a1f87674029af2b84a83a1cdf48.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_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 5508 bytes
SHA-256: 0b0cfd404c3b9ae9773a2cac83b3dc6f54c534985ebf7d71d0ddeaf05941df27
font_01_sfnt_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 10624 bytes
SHA-256: 204bda356fe6c99a154ca5eec894db50f49fbe26776fe8830f549e2333ae03eb

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