Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe10d98d11020c1…

MALICIOUS

PDF

71.7 KB Created: 2021-03-18 13:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ce90f1f6ef240b25047c95da1543ede8 SHA-1: b84ab45f0338f2755ec46b44d6940b77c3a2f6f6 SHA-256: ebe10d98d11020c181310caca67cdb69cc91caaeab503d5082fb48345f724d28
126 Risk Score

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 0.9997

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/123?utm_term=izenda+sub+report PDF link annotation
    • http://fopokigife.mywebcommunity.org/lasko_48_xtra_air_tower_fan_with_fresh_air_ionizer.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/fire_and_ice_melrose_arch_buffet_menu.pdfIn PDF document text
    • http://jiwitoletazadag.iblogger.org/materialize_design_templates.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/fekakuva.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/engenius_durafon_1x.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/dictation_in_english.pdfIn PDF document text
    • http://wuramegojuluz.mywebcommunity.org/walodidisipuge.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/epidemiologia_nutricional.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/aloha_app_not_ing.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_fa71788c96bb43f4bbf42fdd6ea6c850.pdf?index=trueIn PDF document text
    • http://vubapapi.epizy.com/android_sdk_command_line_install_system_image.pdfIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_ac21e694321644d5abdc2c036db3ea5f.pdf?index=trueIn PDF document text
    • http://bolunivagoxel.epizy.com/bacteria_gram_negative.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/sezeridisevinowitakonu.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/proficy_machine_edition_manual_portugues.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/appdynamics_documentation_4._5.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_off0000ddf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF7 5048 bytes
SHA-256: 32a5b7be56f97301b52bf5bbf5cc6000b2a24f2fbd5a10e6b8d7630fe9afc1fc
font_01_sfnt_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 10152 bytes
SHA-256: 99c48efd3ba20bc89b23ad5e3bc0adb68ea64026d5588225b67f8b1cbb1396c7