Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28ffe9acff5b896…

MALICIOUS

PDF

102.4 KB Created: 2021-03-25 14:00:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f00454200391e1ec32f7fb4cb6cbbd70 SHA-1: 556d22ded94a5e7a0f73ddaa2a6a76a966428822 SHA-256: c28ffe9acff5b8962e4c8412c98a0b72b9935d3e48aa9a4084bf1dba44da62be
144 Risk Score

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. It uses a password-protected-archive lure and an urgency-based lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/award?keyword=alappuzha+map+pdf PDF link annotation
    • http://tazikuruwuwozu.22web.org/bulats_online_test.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/jjbDBia/solid_waste_management_dictionary_definition.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/21069693530.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/astaxantina_propiedades.pdfIn PDF document text
    • http://nozatisesufi.scienceontheweb.net/perez_reverte_la_reina_del_sur.pdfIn PDF document text
    • http://nejepogiz.iblogger.org/44403623330.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/hihikYG/axial_flow_compressor_solved_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowosos.myartsonline.com/why_wont_my_passport_work_on_my_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/pet_listening_answer_sheet_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/zepanifazusudo.pdfIn PDF document text
    • http://tejojode.rf.gd/carper_s_understanding_the_law_7th_edition.pdfIn PDF document text
    • http://wojuzixe.epizy.com/dapawavadarab.pdfIn PDF document text
    • http://zitejilid.epizy.com/tutesosokurasojixe.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/libro_un_curso_de_milagros_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/organisation_structure_template_ppt.pdfIn PDF document text
    • http://besidoxaz.rf.gd/skripsi_bayam_hijau.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/kudubatewimuxusuve.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/esl_adverbs_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/animation_maker_app.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_off000152d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D3 5048 bytes
SHA-256: 5f70367bbb1d133e233c06e04424126a0afc24b33712b0f0cce4c036a14af68b
font_01_sfnt_off000163e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163E7 11956 bytes
SHA-256: d26cace820778b145fc1aa47a84c840d3272a2fa945daa8fe86c7947f79c6531

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