Malicious PDF — malware analysis report

Static analysis result for SHA-256 a912a8ca4fb2f832…

MALICIOUS

PDF

73.7 KB Created: 2021-03-07 07:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f53c516c7258f384fdd0603d1b45ad4f SHA-1: f84b478907568d4ee9e1562428b1c520ff312bb3 SHA-256: a912a8ca4fb2f8329865d6e61b61bb19e8b3aa6f7367ecdd0a6b835b4400bd75
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm designed for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=la+la+land+last+song+lyrics PDF link annotation
    • https://gafokogem.weebly.com/uploads/1/3/0/8/130874161/kotemofod-zenirob-dawadug.pdfIn PDF document text
    • http://zonetufe.iblogger.org/john_deere_gator_tx_4x2_electrical_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/mw2gehd/zombie_strike_shotgun.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/tesla_model_3_0-60_awd.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/niJiare/68354991296.pdfIn PDF document text
    • http://kegodedeta.iblogger.org/6748506983.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/xulagolasegikavigana.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/fO1XBkN/zombie_age_3_dinheiro_infinito_apk_download.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/17505945651.pdfIn PDF document text
    • https://xozilozevaloda.weebly.com/uploads/1/3/5/3/135391373/485c970.pdfIn PDF document text
    • https://cdn.sqhk.co/nezotelo/Fal49hj/download_video_no_watermark_savetnik.pdfIn PDF document text
    • http://gugaroro.iblogger.org/how_to_turn_off_hourly_beep_on_armitron_watch.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/webiwufitoveresoronade.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/17678849015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://madukavinoxonal.epizy.com/agathiyar_tamil_movie_mp4_songs_free.pdfIn PDF document text
    • http://kubemumibesedu.epizy.com/air_fryer_oven_elite_manual.pdfIn PDF document text
    • http://mipesijelu.rf.gd/weathering_and_erosion_video_worksheet.pdfIn PDF document text
    • http://mogorixonub.rf.gd/55248033482.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_off0000e2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 5152 bytes
SHA-256: d8ad7ea0dbabc01fe6b4040cc0b76630b26acac0639f6792d591241089b5be91
font_01_sfnt_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 11004 bytes
SHA-256: 85c1d347dc0cb102f6dbbdd523c753dc9fdae1ef6fa4d68213484af59298e66d

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