Malicious PDF — malware analysis report

Static analysis result for SHA-256 cade0fce3102a5cd…

MALICIOUS

PDF

78.6 KB Created: 2021-04-17 21:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aad7368a2c09a21efbc2693669729e30 SHA-1: b75a40dc2913818090f88d7c46cd2f6e963e0461 SHA-256: cade0fce3102a5cd9cfee8f744212ef127bf7e2d648e2899b3e9e53637b71986
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to host malicious content or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=mi+medicaid+phone+number PDF link annotation
    • https://cdn.sqhk.co/pupumukisev/Sjahdjj/72460173934.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/jhOheaQ/best_tiktok_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/hegg9Yi/falciform_ligament_ct_anatomy.pdfIn PDF document text
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/e04c17d1.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/zagoxodovimaj-niriromafunatup-lidufarurad-rajogol.pdfIn PDF document text
    • https://bemiredo.weebly.com/uploads/1/3/5/3/135322707/5ca2baa260bac2.pdfIn PDF document text
    • http://mon-cmb.best/thirteen_reasons_why_season_4_trailertrdju.pdfIn PDF document text
    • http://dreabling.online/monkey_ball_race_gameqsoi9.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/wazib.pdfIn PDF document text
    • http://topcabinets.xyz/67392718902621uf.pdfIn PDF document text
    • https://sarofosifuzatu.weebly.com/uploads/1/3/5/3/135329924/63197dc7ccb1a78.pdfIn PDF document text
    • http://natbeach.space/black_and_decker_3_in_1_waffle_maker_canadaztff7.pdfIn PDF document text
    • http://funseeds.site/killing_floor_2_prestige_level_6gb3vu.pdfIn PDF document text
    • http://begdas.space/debadokajuverejopi9gl.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/zofuluzigasoku.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/ighcbja/buzzer_sounds_buzzer_sound_ringtones_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ropimipaf/iL45NhK/33337555050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/potamotaz/65124571642.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/astoria_espresso_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/julius_caesar_act_3_full_text.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/best_offline_dictionary_app_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/what_is_communications_class_in_high_school.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 5052 bytes
SHA-256: e2940ddd28daf37ccadc4058a5ff8106ae90d1a0f1d9cbe44c28e26405919e82
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 10436 bytes
SHA-256: 95756332618be064232f3b55d732636eaf784df994e92aa9671c2788f55b3cbe
font_02_sfnt_off00011ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3