Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbbb22c4dc30793…

MALICIOUS

PDF

98.2 KB Created: 2021-03-13 16:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4166284fa755cd5e7d898f629e4cae30 SHA-1: a93409cbfc5aaa010a44333c83719bbd8abdf565 SHA-256: 3dbbb22c4dc30793c110ef0a17b877747fbddd37588f32bbd70bac7af77583fb
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=en+nombre+de+la+rosa+pelicula+online+gratis In PDF document text
    • http://lozhobelir.space/how_does_think_pair_share_work3ra3x.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/ivgjicH/nice_button_color_css_on_click.pdfIn PDF document text
    • http://igbusinessabouthelp.com/pijadido0d9lj.pdfIn PDF document text
    • https://mimuromujalu.weebly.com/uploads/1/3/0/7/130739347/nosesomibixabixo.pdfIn PDF document text
    • http://zebrait.fun/confess_colleen_hoover_book_summaryjhx1z.pdfIn PDF document text
    • https://vobasonuniba.weebly.com/uploads/1/3/4/6/134668907/wubimarigepod.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/zosumawawix-tawoxunug-wufatozajul.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/AdidsNH/microsoft_authenticator_app_android_new_phone.pdfIn PDF document text
    • http://fdvsefwfrw.space/python_basic_tutorial_youtubetlpme.pdfIn PDF document text
    • http://vexoxem.scienceontheweb.net/caliphate_movement.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/fjggcVN/48974882215.pdfIn PDF document text
    • https://zativazu.weebly.com/uploads/1/3/4/5/134586929/pixexenujeniwuzitaxa.pdfIn PDF document text
    • http://kopatizukuxaluj.scienceontheweb.net/trustworthiness_and_credibility_in_qualitative_research.pdfIn PDF document text
    • http://s7hmus.org/who_invented_mathematics_in_the_worldxh1c5.pdfIn PDF document text
    • https://gozetosudoz.weebly.com/uploads/1/3/4/6/134601595/mezivijemowodi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_dfe392a15e1d49caae58e2e49c792dc2.pdf?index=trueIn PDF document text
    • http://dusujelad.rf.gd/40020488428.pdfIn PDF document text
    • http://baxodivol.rf.gd/frigidaire_70_pint_dehumidifier_instruction_manual.pdfIn PDF document text
    • http://bexotomilobawa.epizy.com/ducksters_world_war_1_crossword_puzzle_answers.pdfIn PDF document text
    • http://biguvuxurezuto.epizy.com/fake_caller_id_cracked_apk.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_f8517c768ae94f7d8ef697889b4e0d16.pdf?index=trueIn 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_off000129b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B2 5492 bytes
SHA-256: badb1d452f12cf7b04252cecc936f96c00a652a05291cf66724605d57b17fda9
font_01_sfnt_off00013c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C39 11856 bytes
SHA-256: 3fbcda8c42f6821130aa5bf4309b21b2d7d7d9a4e254993b8d33a4585be92232
font_02_sfnt_off00016408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16408 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8