Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c0fc3e7492e94f…

MALICIOUS

PDF

77.6 KB Created: 2021-03-15 21:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 34411c42dab1d461828717495ea9e5e3 SHA-1: 23697055055d3735374b803a1b47c64ee9a1104b SHA-256: 24c0fc3e7492e94f2fd768be878308b01ff2444a1a6148af7a98f452c5517801
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The document body, though heavily obfuscated, contains text that appears to be a lure related to turning on a TV, directing users to a suspicious URL. The presence of external URIs and link farm heuristics further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xajibur.ru/strik?utm_term=how+to+turn+on+aquos+sharp+tv+without+remote PDF link annotation
    • http://gamuxiwami.getenjoyment.net/asana_pranayama_mudra_bandha_portugues.pdfIn PDF document text
    • https://cdn.sqhk.co/tupuxinekowa/HieCqQ9/vehicle_registration_transfer_form_tamilnadu.pdfIn PDF document text
    • http://xareletaxaz.iblogger.org/el_mejor_curso_de_ingles_gratis_nivel_avanzado.pdfIn PDF document text
    • https://cdn.sqhk.co/sufadoma/iXK66gf/disney_sign_in_verizon.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/iiZggin/why_is_my_bunny_running_around_so_fast.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/1hejfii/35062891262.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/haHYjb2/77217092737.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/how_to_connect_turtle_beach_wireless_headphones_to_iphone.pdfIn PDF document text
    • http://sikevemekoma.mypressonline.com/82412171467.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/angular_5_documentation_download.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/dusopegudiretu.pdfIn PDF document text
    • http://sanelobazigi.medianewsonline.com/injection_bijection_surjection.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/free_downloads_calculus_manual_solution_by_howard_anton_10th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/rowonevogumosererurujated.pdfIn PDF document text
    • http://nugoxasozuvazet.rf.gd/frauen_bundesliga_spielplan_2020_19.pdfIn PDF document text
    • http://bofisul.rf.gd/nulegopelumur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d00036-d796-4dc6-b0ee-12f5ceddfc04/physics_formula_for_work_done.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a0085e-c006-4cd7-a4db-d1cb293fbb8a/buxosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91b1502-0225-4030-8cfb-92b64d1c2db1/posidesit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ffd75c-165d-4045-befb-26ae4f4b7669/migaxox.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/jaxovavezetira.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/b_m_l_t_ki_full_form.pdfIn PDF document text
    • http://vurasoda.rf.gd/69191895691.pdfIn PDF document text
    • http://nebojemesiwi.atwebpages.com/memolagujuvorodoxumem.pdfIn PDF document text
    • http://vakisetituli.rf.gd/degatolofobum.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_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 5264 bytes
SHA-256: 0a48bf9861fd2d43c5a61e78cdac5906ffee1ac9b9dd5758776d85896dd3e45b
font_01_sfnt_off000102fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FE 11168 bytes
SHA-256: fea6e1936404218bb91593cfac3002770c55e3200d93f705f623266a697e8c14