Malicious PDF — malware analysis report

Static analysis result for SHA-256 66434da018305d6e…

MALICIOUS

PDF

90.6 KB Created: 2021-03-23 03:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e16d9bee09ff1946a305a5bcb5a0d91f SHA-1: 874c6d9ed2056fe46e9b9f1a850c16567506b8ae SHA-256: 66434da018305d6e8b03ab8a9be711a02d4a48962f62d9762864dba810c84c8e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/123?utm_term=chestnuts+roasting+piano+sheet+music PDF link annotation
    • https://fidifeso.weebly.com/uploads/1/3/1/4/131408027/riwipena.pdfIn PDF document text
    • http://idealicacolumbia.site/something_beatles_piano_sheet_music0qph7.pdfIn PDF document text
    • http://organize.shop/bagideferamuvonewuahow1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_5fdd31f29fdb6.pdfIn PDF document text
    • http://meetchat.space/diarios_de_motocicleta_libro7rj3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_600ecfc9086a1.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/palif.pdfIn PDF document text
    • http://helplnstagramoffice.com/data_analysis_google_sheets8dihz.pdfIn PDF document text
    • http://portkamesto.site/vevapobikibefozgu74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445101/normal_5fc96b8389a7b.pdfIn PDF document text
    • https://fafidapumexeri.weebly.com/uploads/1/3/1/4/131437561/7756823.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/xofiwizeribumo.pdfIn PDF document text
    • http://arendagg.xyz/68997088008gysy1.pdfIn PDF document text
    • https://muvomajivogi.weebly.com/uploads/1/3/4/3/134373377/pirakexo-pijilurupisew-vobusukapuraf-pozalotikigi.pdfIn PDF document text
    • http://d-youtube.com/text_to_voice_converter_freeo5a65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/842aca33-f995-4b54-874a-2a93ba27ae15/how_fast_is_a_toyota_camry.pdfIn PDF document text
    • http://zozujuzozupu.rf.gd/canara_bank_education_loan_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc7802c-b8f6-49f9-96a0-ef5dc46ae0a7/24717909991.pdfIn PDF document text
    • http://xesogopobatobop.epizy.com/amazing_grace_piano_sheet_music_free.pdfIn PDF document text
    • http://kuzekatowo.rf.gd/taleget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe40803-606b-4bf3-810a-31161fb9358a/clasificacion_de_las_funciones_calculo_diferencial.pdfIn PDF document text
    • http://roxudafemif.epizy.com/44046099080.pdfIn PDF document text
    • http://parorusoba.rf.gd/divinity_original_sin_2_crafting_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E45 5220 bytes
SHA-256: d75655b0f660b53b71457b88294cdf9bb5c89e031b78753aaab55704db1d65e4
font_01_sfnt_off00011fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 11808 bytes
SHA-256: fd94e354d03257b11e9e5e4883cf93f835847530e2375f322ce3a4cc3caeb313
font_02_sfnt_off00014792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14792 16100 bytes
SHA-256: d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6

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