Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b49d4626b238ba3…

MALICIOUS

PDF

77.2 KB Created: 2021-03-17 16:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: afc26d6138a49a15be956434634e24ab SHA-1: 1e009a761abeca73c960ab48f5f7c4b71baa726c SHA-256: 7b49d4626b238ba343f52e2ba8963347a0f32fe9f7c8b9ff57c0d0d63ebc13a5
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 0.9992

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://pelibifir.ru/123?utm_term=vocabulary+words+english+to+bangla+pdf PDF link annotation
    • http://muzomabavima.medianewsonline.com/11613265612.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/beautiful_creatures_book_online.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/how_to_program_your_rain_bird_sprinkler_system.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/nasb_macarthur_study_bible_2nd_edition_premium_goatskin_leather.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fd857956c2b7.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/6111333703.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/algebraic_topology_notes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fd06db49aa7a.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/diwawun.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/aa8799dc-0e3d-49f4-ad8c-a9f8c4863e0d/58236506820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a481489-e6e1-4761-869b-d56d210192e8/is_goat_simulator_multiplayer_split_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/55542443000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a97fa18-598f-434e-8222-a2c0fcc48902/clasificacin_de_cuentas_contables_activo_pasivo_perdida_y_ganancia.pdfIn PDF document text
    • http://zijedan.atwebpages.com/lafunuwitizamamatimane.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/savovamiwirufufuludof.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/56825881664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c078df-c77b-4244-88ad-a83881857c71/kisorutejirur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a9d95e-366f-4ba2-8415-9d7cb0745208/interview_questions_and_answers_for_teachers_in_private_schools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9520c37-4ba1-4648-a4e6-2acd979b4290/honda_harmony_hs520_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/41944561078.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/designing_data_intensive_applications_2020_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935e3ab9-0dc7-4e2a-87de-567aeff288fb/fios_remote_not_connecting_to_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb28864-6d4d-4929-920b-ae83ab401954/conflict_management_in_the_workplace.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_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5716 bytes
SHA-256: d2f9841a0f3f7e2a7aa2322a14d28d435c6c8633f7546c30ec1bf9be55c5fe94
font_01_sfnt_off0001013c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 11176 bytes
SHA-256: fb6352668861df0adc1d3f9a7e11cf9b48fe24d9aee26748f9651a4613a12908

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