Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b72da68a8962b0e…

MALICIOUS

PDF

83.3 KB Created: 2021-04-13 20:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b9a58a27cd2f3acd78157806a2e35796 SHA-1: 24b09f36896ffc475e59fe71a1f2f107ffc51215 SHA-256: 6b72da68a8962b0e1a77f555c7af74ce4d5cbf7dedb5f6664f233edfd0618b9a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain associated with a potential phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm designed to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=final+quest+rick+joyner+pdf+book PDF link annotation
    • https://sixabizutobago.weebly.com/uploads/1/3/4/6/134613494/1564834.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/jidifJt/59155540425.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/jcjeyji/zubifulawo.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/ie2jdXY/jw_library_spanish_app.pdfIn PDF document text
    • http://lijamerogavex.iblogger.org/bmt_tax_depreciation_schedule_application_form.pdfIn PDF document text
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/15cc8f757.pdfIn PDF document text
    • https://vizakadaji.weebly.com/uploads/1/3/4/4/134491897/9608963.pdfIn PDF document text
    • https://torusakewojowep.weebly.com/uploads/1/3/0/8/130814967/najivafuraxuvulela.pdfIn PDF document text
    • https://cdn.sqhk.co/podizapexiv/gdUielx/50844081956.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luzivamo.epizy.com/ser_bachiller_sierra_2020.pdfIn PDF document text
    • http://xelurutokige.rf.gd/atmega328p_pinout.pdfIn PDF document text
    • http://fujalomasetugib.rf.gd/msi_b150_gaming_cpu_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fa3169-a333-43e7-ba4d-d99018258c87/how_great_is_our_god_how_great_thou_art_chords.pdfIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_4ab3b2a638d34e059a1a745fe7c75626.pdf?index=trueIn PDF document text
    • http://moxawaten.epizy.com/aarariraro_song_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc99870-03ef-46f1-964e-aea59ce6d9e7/elearning_storyboard_template_powerpoint.pdfIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_bbd5c4e573fa4f20a02289052895545c.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_0464f4c0d5874e3da8a727f3fe0e1645.pdf?index=trueIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_9fdd078378a44fd79868b594b4701abf.pdf?index=trueIn PDF document text
    • http://julivaradisakit.rf.gd/69009374181.pdfIn PDF document text
    • http://bikufupok.rf.gd/android_textinputlayout_error_background.pdfIn PDF document text
    • http://visobiwedixupip.rf.gd/simple_framework_agreement_template.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_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 5612 bytes
SHA-256: 7b505d723aa6b66b16fba8b8d68dfb144d24b1e0b3b704dc2e50b5b3bdfec434
font_01_sfnt_off00011b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B41 10784 bytes
SHA-256: 95ed4ee5de0317d2f2b5c2b0aac56d1bae2edaf76c2138bac148b48477a50a5e

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