Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cbab290df22671…

MALICIOUS

PDF

105.6 KB Created: 2021-03-15 23:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 21ac305d73b543efd9e01b7a52d12b79 SHA-1: 7d6be5d04ada814f9b8cd581a04bdb354f27a1e7 SHA-256: b3cbab290df22671f081391812e78d4f1be77fe7cf2e99fd471ba76f19cb3df8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains metadata related to 'Janatha garage movie diwali scene' and wkhtmltopdf, suggesting a lure to attract user attention before redirecting them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/123?utm_term=janatha+garage+movie+diwali+scene PDF link annotation
    • https://cdn.sqhk.co/kepozote/jihgjoY/64600538571.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/ixzjjgd/furious_jumper_minecraft_spiral_3.pdfIn PDF document text
    • http://vejofewi.iblogger.org/james_allen_wedding_band_review.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/hdIOeFn/lettre_alphabet_wolof.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/wgfibhc/change_eye_color_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/jgii2ge/ted_bundy_cave_coordinates.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/FYBxejj/49695766739.pdfIn PDF document text
    • http://basukoroj.22web.org/politically_incorrect_guide_to_the_british_empire.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexuze/digPing/tiny_bird_garden_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/gdCiegh/nfl_tv_schedule_sunday_sept_15.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/4e847e48-e9eb-490b-b298-da6085c76bd1/17991848936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd69984-3625-43f8-99a8-26305e110ff8/kekuxisupexeju.pdfIn PDF document text
    • http://pemukusa.epizy.com/jibiletawav.pdfIn PDF document text
    • http://jenuvuzawo.epizy.com/98570130651.pdfIn PDF document text
    • http://kubitilabevovup.rf.gd/38727969948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79bc1ad0-c1e9-4400-bbff-c545f91d4543/where_the_wild_things_are_costume_diy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb491eee-10ac-4633-85af-7da2e17dbeff/competency-based_interview_questions_and_answers_for_managers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53f8491-ce40-4a0b-8962-23755c8d659c/when_was_the_marlin_336_rc_made.pdfIn PDF document text
    • http://nigabosepa.epizy.com/imagenes_de_la_metamorfosis_dela_mariposa_para_nios.pdfIn PDF document text
    • http://tixinova.rf.gd/particle_physics_jobs_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff285f10-6c7e-4c0e-b02d-545e2735fed0/school_messenger_app_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2674efde-2286-4dee-9202-43b6eebfa21b/union_journeyman_plumber_salary_california.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14935 5492 bytes
SHA-256: 7c4d9306cab855c35fa067177781ca7fabf499b711d2d66889a3ce71d9a467b0
font_01_sfnt_off00015bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD1 11484 bytes
SHA-256: 0c3ff044de29bebce27c991324a1cab43e57ac8a9af7048ca87e9980feff5e9c
font_02_sfnt_off00018370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18370 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e