Malicious PDF — malware analysis report

Static analysis result for SHA-256 99cb48b3d73deb98…

MALICIOUS

PDF

78.8 KB Created: 2021-03-26 09:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9b925befeb2bcbc75a821e10a5097144 SHA-1: def5c24738c17000be3cb109e50bd1fc4cf77638 SHA-256: 99cb48b3d73deb98f20cbb3ca1d863931d4abede85886c954a77ae98960a35fe
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 0.9961

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://vilenefex.ru/123?utm_term=dispute+credit+report+online+vs+mail PDF link annotation
    • http://bagezokazuraw.medianewsonline.com/55049874815.pdfIn PDF document text
    • https://cdn.sqhk.co/vikaxokaso/hhjjijI/world_wrestling_network_academy.pdfIn PDF document text
    • http://gomijexa.mywebcommunity.org/english_spelling_words_for_grade_4.pdfIn PDF document text
    • https://cdn.sqhk.co/lasijutag/jhhhrqo/dungeon_heroes_5_strategy.pdfIn PDF document text
    • http://fiteduwad.22web.org/ps4_emulator_real_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xifobariw/111pgc4/watch_red_button_games_on_sky_go.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/jfgdWM6/zavetivovudugonixe.pdfIn PDF document text
    • http://jabakibiv.iblogger.org/sedona_method_release_technique.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/tajowum.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_fdf6dba389d4419dac36479ad9123513.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/228bac6e-2510-49e7-b055-be4e25b52173/ios_12_app_development_essentials.pdfIn PDF document text
    • http://jujuletofu.onlinewebshop.net/70980901363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8260c15-a061-46d8-ad04-cb5ee51070cf/how_to_use_black_and_decker_rice_steamer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa1ca6c-e118-4835-8a7d-e0f97834176a/supreme_court_case_brown_v._board_of_education_of_topeka_kansas.pdfIn PDF document text
    • http://nepupiborama.rf.gd/84724738733.pdfIn PDF document text
    • http://nogobixa.epizy.com/vebuxasodelivomuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b8997a-7f20-4f4f-a014-7cd885cd998b/89518219419.pdfIn PDF document text
    • http://pabizazixivak.epizy.com/55399429107.pdfIn PDF document text
    • http://belukamafanes.rf.gd/gta_vc_cheat_codes_apk.pdfIn PDF document text
    • http://kegonen.rf.gd/genetics_from_genes_to_genomes_5th_edition_solution_manual.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_7280ea2c91cc4f35abccd1b6e21cae5a.pdf?index=trueIn PDF document text
    • http://suraweko.epizy.com/rixato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e50dda-2af4-407b-b0d9-c103de95045b/how_to_scan_a_document_on_hp_photosmart_d110.pdfIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/que_es_soleamiento_en_arquitectura.pdfIn PDF document text
    • http://jiwigazuvix.rf.gd/45131088396.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_off0000f3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CE 5276 bytes
SHA-256: b97f0bd00a9c71e43f7fbb36e6cf101626655bc032bc624a75a81d866caeffe1
font_01_sfnt_off000105b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B6 11028 bytes
SHA-256: d4bb08bf25e471d87c6afa870e1d1cc9384bc9426c347cf721790fcdda9f6411

Open this report in the interactive analyzer, or submit your own file for analysis.