Malicious PDF — malware analysis report

Static analysis result for SHA-256 17453863329003d8…

MALICIOUS

PDF

74.4 KB Created: 2021-02-26 22:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 341f9e8a97613f6d7a58753c9e1aaf64 SHA-1: 2949d3132fe150f9bbca2e17758d68321605007a SHA-256: 17453863329003d81c95c5ece73b164e7f57eb7d04bf1509c6fc584213a95b8c
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to 'gimoguvi.ru'. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests the PDF is designed to host many links, likely for SEO manipulation or to distribute malicious content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=driven+3+k+bromberg+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388156/normal_603057ab3de07.pdfIn PDF document text
    • https://cdn.sqhk.co/rirakibugo/fjjjagg/video_collage_maker_for_pc_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_60220ac0ec62c.pdfIn PDF document text
    • http://fikunigogijori.22web.org/tawalasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_602b6de84bab7.pdfIn PDF document text
    • http://hydrofthol.space/27378571153575ug.pdfIn PDF document text
    • http://metagopu.22web.org/american_heart_association_acls_pretest_answers_2016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabasuxogakuwet.epizy.com/what_are_the_principles_of_the_mediterranean_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/cheat_for_gta_san_andreas_apk.pdfIn PDF document text
    • http://jivugojazop.epizy.com/selulatebagaduzirase.pdfIn PDF document text
    • http://wevaxelim.rf.gd/lumivuzop.pdfIn PDF document text
    • http://wopidexojabin.rf.gd/adipose_stem_cells_and_regenerative_medicine.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/karusum.pdfIn PDF document text
    • http://nutimuratibuzur.epizy.com/law_dictionary_english_to_urdu_free_download_for_pc.pdfIn PDF document text
    • http://kikameruvof.epizy.com/samsung_dmt800rhs_error_code_5e.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_off0000e6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EB 5368 bytes
SHA-256: e11d0da32a1b9907f09b5a3960f4e20be770c7ee5dce82d841f9ee5d9b2c5475
font_01_sfnt_off0000f92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 10504 bytes
SHA-256: e6879f7db2d2894cec16bbe3436c759c366d717be39d7cdf0d0b462b01e602fb

Open this report in the interactive analyzer, or submit your own file for analysis.