Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1624f8578ae6cd…

MALICIOUS

PDF

77.7 KB Created: 2021-03-30 22:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82c4f951b00589717322ea7af5a3e79d SHA-1: 6b7cffb0f5d656074365469ba94250d9b48fce88 SHA-256: ab1624f8578ae6cd05d4f3347ae644f264f7f6cc6a2184de2d83f39798b76a70
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/award?keyword=libro+de+blancanieves+en+ingles+pdf PDF link annotation
    • http://ionatr.fun/86571514999sjm2d.pdfIn PDF document text
    • http://richteam.site/sniper_ghost_warrior_3_download_for_androidtez0t.pdfIn PDF document text
    • http://world-wildshop.com/valvular_heart_disease_guidelines_20193y3tl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380699/normal_5ffc717d7d650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_602207e31c363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_60435574f1a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_6014aad64bdea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5ff540d37c887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_60370078ebf57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_6052ec4a9c61d.pdfIn PDF document text
    • http://fumigatoff.online/apes_invasive_species_worksheet_answers_key_cane_toads0tuqj.pdfIn PDF document text
    • http://kataeta.club/icc_world_cup_2019_teams_downloadvu5bb.pdfIn PDF document text
    • http://raisinshq.pro/setodejijasadafm6r.pdfIn PDF document text
    • http://remastacer.com/js_error_referenceerror_require_is_not_definedbjyqc.pdfIn PDF document text
    • http://dhl-order.info/rikunemowakezuleluicxcs.pdfIn PDF document text
    • http://erogan-encolumbia.site/microsoft_office_2010_not_working_properlyq5otk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_6046634202b7f.pdfIn PDF document text
    • http://svoydvalend.xyz/husqvarna_125b_spark_plug_ngkrpm5g.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/d43af6f4-94e6-49c1-8233-c92bca8747ec/sri_lakshmi_stotram_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2b4267-dcdd-4deb-8f8c-695bf0847d89/what_is_a_system_bus_in_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a824e5-92eb-4d9e-9337-ec12bde53fda/glacier_bay_dual_flush_toilet_weak_flush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945559f2-88f6-42ee-b293-b149f3876201/nutrition_care_process_model.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_off0000f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 5464 bytes
SHA-256: 4499c21f8ad39d987a0712dfbaf13d26cb9bac3634798cbbfa725342f2c402eb
font_01_sfnt_off000104b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B0 11260 bytes
SHA-256: 0e846148ed17873f2322430c87e0799a81b0bf210e8de773f754ca75b20b3a96

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