Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b258e809555ad59…

MALICIOUS

PDF

112.6 KB Created: 2021-04-02 02:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c1257e02e43405da932d767ec9219284 SHA-1: 5fd1cea3d35a7df2bd57c435eed90d70ecfe4935 SHA-256: 2b258e809555ad590ec16036bf8a086b295d0eb6bc15a61f1e9f85f80679af20
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/aws?utm_term=you+are+responsible+for+your+own+happiness+meaning+in+hindi PDF link annotation
    • http://vitetiw.getenjoyment.net/aerodynamics_jd_anderson.pdfIn PDF document text
    • http://islandlandscapesbb.com/dr_sakis_wikipediabyn69.pdfIn PDF document text
    • http://sweetmeet.online/lufofusedisagib0n6mi.pdfIn PDF document text
    • http://vivadoctor.ru/how_much_does_an_information_systems_manager_make_a_year2vgdd.pdfIn PDF document text
    • http://reduslim-eu.site/ivanka_trump_height_in_inches93f29.pdfIn PDF document text
    • http://pagebake.com/pisifikosukureko3z9ta.pdfIn PDF document text
    • http://wagelesakofaj.22web.org/bmw_x4_2020_brochure.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3dffe4-be46-4f6d-9af0-a1d411698a31/62565230772.pdfIn PDF document text
    • http://piwuzodoxomox.epizy.com/american_idiot_full_album.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/why_does_my_smoke_detector_have_a_green_light.pdfIn PDF document text
    • http://giwofigu.epizy.com/60768392788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2de1821-4b69-4282-aad2-24318d3e7c99/mululoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ba46b6-75d2-48da-b2c5-8674e85d3938/sparknotes_the_scarlet_letter_chapter_20_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/ant_design_form_react_hooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9f0ce6-ca27-4989-9652-f72c653a7e36/viewtv_at-163_remote_code.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/walgreens_deluxe_wrist_blood_pressure_monitor_instructions.pdfIn PDF document text
    • http://jaterivi.epizy.com/acidosis_tubular_renal.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/yearly_financial_planner_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40211407-bfe7-4fc0-a393-dfe51abfe55e/difisumevovinel.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/wagner_flexio_4300_paint_sprayer_reviews.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000129ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x129EF 16836 bytes
SHA-256: 60a6ab9642600a9a0492791a835ae272d53ec7df56c2caecf6cf915c488fb8a0
stream_006_off0001809c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1809C 16848 bytes
SHA-256: 8aefa5d3191cdf1910b8ee9f05bb91d36bb80ec4965a625c8a4a6c4dc3a3ebac
font_00_sfnt_off00011675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11675 5748 bytes
SHA-256: 414e9547258729582c5364742844f1307fdea6c52dbdb1dfc2d2609c82e9fa6c
font_02_sfnt_off0001507c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507C 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_03_sfnt_off00015bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BDE 10732 bytes
SHA-256: 59743c020901cadd73c53f88934caa69f72450d20325c17adcf3297f8a5601bb