Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c40ebe27ea5ec2f…

MALICIOUS

PDF

81.5 KB Created: 2021-03-24 23:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 127a4be46be1b95cacef80c434117798 SHA-1: 183d731fee6d7e30d44661c64f1c41fb2444ab0b SHA-256: 2c40ebe27ea5ec2fa3556e1997865985f27758fca2ca62dd5c283542885cafd3
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, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to exploit kits or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=final+fantasy+1+marsh+cave+b3+map PDF link annotation
    • http://bridgecommerce.com/m_audio_fast_track_drivers_windows_xpp6kvw.pdfIn PDF document text
    • http://wonder-ita.fun/41917988502bhh1t.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/9421993.pdfIn PDF document text
    • http://zipujesilan.22web.org/xibivavi.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/IhfFxhe/baby_monitor_iphone_app_motorola.pdfIn PDF document text
    • https://cdn.sqhk.co/fefoseto/gh0jijg/72758346908.pdfIn PDF document text
    • https://kifadinegek.weebly.com/uploads/1/3/1/4/131407901/e04f407.pdfIn PDF document text
    • http://xozonline.ru/digatedosokozafepac0kww.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/weather_station_home_depot_canadaxv13c.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/ujjGVjf/chemical_methods_of_wastewater_treatment.pdfIn PDF document text
    • https://nogiwesetegi.weebly.com/uploads/1/3/1/6/131637024/c086e56.pdfIn PDF document text
    • http://reassurez-moi-fr.info/information_technology_reportn6uao.pdfIn PDF document text
    • http://delaem-sami.online/dnd_5e_book_of_ancient_secretshdyot.pdfIn PDF document text
    • http://pedurovizosika.22web.org/31837069881.pdfIn PDF document text
    • http://laitlabs.pro/keys_backyard_spa_instructionsy20zg.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
    • http://xawabaxazulaga.epizy.com/43702308727.pdfIn PDF document text
    • http://muzoxed.rf.gd/boboiboy_movie_2_in_english.pdfIn PDF document text
    • http://boxalage.epizy.com/66879469215.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_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 5404 bytes
SHA-256: 2387d5661d8574c01ba2021af92f4534a5510371aa24c27b95a96e334efdd459
font_01_sfnt_off0001058c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058C 10544 bytes
SHA-256: c99536eb36ce4f6d01fa531fe74e1c2447824eed3eecc2c6dd5ac6330688e8d0
font_02_sfnt_off00012969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12969 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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