Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b9b90a4fe6415d…

MALICIOUS

PDF

78.4 KB Created: 2021-03-07 19:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e2bd9ca141ab35def150ae8c3bf2c0c8 SHA-1: c9fc4ef4bfa1f2df0cb727e280616d3d9d70b46b SHA-256: a3b9b90a4fe6415d858e22ef96fccad20f8886ac985c56b86e4da4b8b0fb9565
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing attempt. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/award?keyword=what+do+colours+mean+in+branding PDF link annotation
    • http://rejemezurufoveg.mywebcommunity.org/la_divina_comedia_quien_fue_el_autor.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/viva_el_toro_book_chapter_1.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/meloxanugudewid.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/sex_and_the_city_season_1_episode_12.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/how_to_reset_honeywell_thermostat_th8321r1001.pdfIn PDF document text
    • http://begedotupatato.66ghz.com/idling_to_rule_the_gods_guide_pet.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/dell_active_stylus_pen_pn350m.pdfIn PDF document text
    • http://torixewiser.medianewsonline.com/86332153424.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/paloma_tankless_water_heater_error_code_c2_11.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/42539023556.pdfIn PDF document text
    • http://rowoniwetob.atwebpages.com/94382919924.pdfIn PDF document text
    • http://firofukukonemev.epizy.com/what_is_meant_by_slant_height.pdfIn PDF document text
    • http://gotuzarodeg.epizy.com/wulatodez.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/design_of_reinforced_concrete_10th_edition_textbook_solutions.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/how_to_write_a_summary_example.pdfIn PDF document text
    • http://dowinoxerirud.epizy.com/26482058414.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/rheem_gas_furnace_prices.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/d-link_dir-890l_ac3200_router.pdfIn PDF document text
    • http://ralakevitodabaj.epizy.com/regular_verb_list_in_hindi.pdfIn PDF document text
    • http://buzanuziti.myartsonline.com/music_and_movement_activities_for_early_years.pdfIn PDF document text
    • http://muzemus.epizy.com/raymarine_c120_chartplotter.pdfIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/teborepu.pdfIn PDF document text
    • http://jevusavisa.epizy.com/kobexanusekesodafo.pdfIn PDF document text
    • http://wetulokavavute.epizy.com/63006864296.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_off0000f787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF787 5508 bytes
SHA-256: 4f1e731671684a9b25bc05affdf092de70c33aee5a720f12fbccd23d1e8930c4
font_01_sfnt_off00010a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1C 10000 bytes
SHA-256: bded03ea09f10ec7cf763431191644d003c88f146e07920b617d613792e4dda3

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