Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72c352b2a5176b5…

MALICIOUS

PDF

82.9 KB Created: 2021-03-21 08:22:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ad1da7ebec6569f82b9f52307a14b8fc SHA-1: 67c9e5a541a4abc87f2096d584eddba8f27242a3 SHA-256: b72c352b2a5176b53675ff23eeb562652ccc91d698033ed82834d94364ef94d8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable hosting or unknown reputation domains, suggesting a phishing or link-farming attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=new+hope+church+of+christ+middleton+tn PDF link annotation
    • https://cdn.sqhk.co/dazulegug/igDwUhh/somijaju.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/YJhg6ij/prison_break_season_4_episode_24_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/Ugha736/83056512123.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwasusul/oUgfgfG/boxhead_2_player_zombie_game.pdfIn PDF document text
    • http://bujiler.22web.org/holistic_nursing_scope_and_standards_of_practice.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/hG7idjw/kidcity_hello_neighbor_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/jbhayzT/sakura_school_simulator_update_terbaru_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/gijjnhi/71109751839.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/dGOyAja/free_printable_weekly_lesson_plan_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/A1gdHhH/promo_code_for_walmart_grocery_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/KkrCIjh/34427746828.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/jLwgjr2/forolinodadeti.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/4234712d-5a7c-4736-aed8-a0c596612a07/how_to_block_jacuzzi_tub_jets.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/56616941245.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/68435408186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666f348e-0b2f-4e3b-a3af-977808725fe9/whats_in_the_sky_tonight_canada.pdfIn PDF document text
    • http://pidejejorojomon.epizy.com/the_second_world_war_book_antony_beevor.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/godotofudutu.pdfIn PDF document text
    • http://xebesisogunodok.rf.gd/sefesugiwemegutorojum.pdfIn PDF document text
    • http://risasuwoz.epizy.com/chandrayaan_2_information_in_newspaper.pdfIn PDF document text
    • http://bidusopevix.epizy.com/shed_plans_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b567cef-5ab9-4ed6-b4ab-aa3e6b05a853/8869647779.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_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 5248 bytes
SHA-256: 61d8acebd93f8f95111c4101b0c873764a4e3dae66e29ab7125b6ca9726db9d9
font_01_sfnt_off0001180a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180A 10640 bytes
SHA-256: a2cdc69e1f48fed2b6c8065948ee6d5add15d86fc18e9ca3828ac2d29fe97482

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