Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba50eaaf9485e878…

MALICIOUS

PDF

84.3 KB Created: 2021-02-24 18:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6e70024bff5d7732d0f4603009b701e8 SHA-1: cad1d3f22ecbd1cedcb8253bfae56ad18e101392 SHA-256: ba50eaaf9485e8786fb479bcdd0ece725d8b4f5b963a9c7c743f7ba1e6b3b03e
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates an attempt to lead the user to external content. While no scripts were extracted, the overall structure and URL distribution point towards a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://druttle.ru/wb?keyword=destiny%202%20last%20wish%20raid%20solo%20chest PDF link annotation
    • http://nawukebakesejid.iblogger.org/36968530139.pdfIn PDF document text
    • http://yesstore.pro/playstation_network_customer_service_refundujavv.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/e2091e820bed631.pdfIn PDF document text
    • http://yoganchik.space/257545081922zee9.pdfIn PDF document text
    • http://thehensleys.org/blender_vfx_tutorialmfdqw.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/what_did_the_government_do_to_help_the_great_depression.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/what_is_cycle_efficiency_in_thermodynamics.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/29496764362zza2x.pdfIn PDF document text
    • http://nimidarizul.22web.org/27617784441.pdfIn PDF document text
    • https://pepesavujol.weebly.com/uploads/1/3/1/0/131071240/zijowuga.pdfIn PDF document text
    • http://netarowivon.iblogger.org/balcharit_series_comics.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/ipad_mini_newest_model_2020.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/wijorawidoxe.pdfIn PDF document text
    • http://fusavexupisedi.iblogger.org/atom_word_search_puzzle_answer_key.pdfIn PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/lupavirokaragogudezi.pdfIn PDF document text
    • http://terugate.mypressonline.com/84262572430.pdfIn PDF document text
    • http://patavitukazinaz.iblogger.org/javafx._platform_is_not_defined.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xulalozuvemuve.rf.gd/14719918870.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/what_does_guerrilla_warfare_mean_in_social_studies.pdfIn PDF document text
    • http://bujitajaxo.epizy.com/71623230141.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/cuisinart_cpc_600_series_manual_espaol.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/xirizugizenurisuzanu.pdfIn PDF document text
    • http://zijubeda.rf.gd/ada_ramp_guidelines_2018.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_off00010e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 5352 bytes
SHA-256: 2b0a9be8d12c8dea0794902afa33f39ad2a904269ba1c60a3cddb10ae408c7f0
font_01_sfnt_off000120b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B4 10196 bytes
SHA-256: 5c1cc98eb4530d496f07618e0ad976f8d6c011a4e9a146b38a4835e5231fb530

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