Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbcad4d840ba965e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-17 18:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9f4eaeb3c5c32658c3e706e9cd4e222c SHA-1: b010c11235a700c8b883accfc225888df451c825 SHA-256: dbcad4d840ba965e7790f03669bd20179fb03363a864d3362029216de3519df7
186 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. One of the primary external links is to 'soxebez.ru', which is likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=administrative+management+notes+pdf PDF link annotation
    • http://jiwujut.iblogger.org/louisiana_saturday_night_fiddle_sheet_music.pdfIn PDF document text
    • http://nomerojelevat.22web.org/5_point_rating_scale_for_performance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_5fea1eabec899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_600e55aa488a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_60405fd56f3c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427267/normal_5fde9f8b76b2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375210/normal_60025561cdd90.pdfIn 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/e796b5b6-4fa1-430f-b565-087e4993aad4/98696190939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d966957b-9258-4615-a198-7df45a282653/65735323826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4060a9-2f34-4203-89e6-dd7f339d5391/tozer_pursuit_of_god_study_guide.pdfIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_e5c7c2a4dd7547fda496dc5e8f147a62.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_fc78c819edfa406d87bc162daaad93f5.pdf?index=trueIn PDF document text
    • http://kilaliwe.rf.gd/english_speaking_course_notes_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa08278-de0e-438e-8723-9ee949871741/it_transition_plan_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fe6ff4-57a1-423d-bd60-05530cfa969b/sonaxutimipezasewozavi.pdfIn PDF document text
    • http://rinaditinimi.epizy.com/xedodeloni.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/roliros.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_762710aa78c144cbb83785906930300a.pdf?index=trueIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_736a9f2de8f846d19f5f9a496e954718.pdf?index=trueIn PDF document text
    • http://titomukoma.rf.gd/yes_no_food_list_21_day_sugar_detox.pdfIn PDF document text
    • http://figopovu.epizy.com/65349416316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/823e0205-73ae-46a7-987e-02d75566172f/gixalalot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959773f1-9b59-4802-8bf7-8ed2dd2b8a4f/descargar_el_nombre_de_la_rosa_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_bcc683fdb6ec4e7eb7c243638a46ad7b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 5376 bytes
SHA-256: f5f7820eb6e042b1bf38855d814052be93d49082e530b13d7153ff814066b6cd
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 10940 bytes
SHA-256: 96c43a8cfdc1c2880ab4fbdd742a8dc35b6903b933d435d2d5ccfff87274325f

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