Malicious PDF — malware analysis report

Static analysis result for SHA-256 255bd5df019b181a…

MALICIOUS

PDF

54.1 KB Created: 2020-10-16 16:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ed780fdcc354815793f9e534c9204d19 SHA-1: bca2950118109c8d0a7de40547a4a40e9320f78e SHA-256: 255bd5df019b181a51aaea48b2af3f7f9af9f56fe94740218dd2c844de2441ae
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=creating+america+reading+study+guide+answer+key+pdf In PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/1902f26163.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/6d7c7.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/leniniwugezabesobe.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/nivon-dokivanil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f87f8d18ac58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f88d9c6b6a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5f8973332e1f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f871fe3ec356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f88a94e2c4a4.pdfIn PDF document text
    • https://wopuremob.weebly.com/uploads/1/3/2/6/132696580/rafox_rexup_woponusipisima_lorumo.pdfIn PDF document text
    • https://xozanazefozi.weebly.com/uploads/1/3/0/8/130874019/2648b9e00982.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/c6e4e.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/jibepare-vudaramuzi-refirezagulele.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/wumepiv.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/dewovabarodugos.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/766597.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/2ef8772951d488.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/pizil-tojirimo-bidesun.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/643b992f0e.pdfIn PDF document text
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/4184348.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/0b7569b25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3720/3364/files/85696617407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/boss_tpsrf51_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/luzokutiwol.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_off00009311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9311 5604 bytes
SHA-256: b552a33c47e26e7f9700290771826d04b3f2fc7405b22723a8b92fe682e617bd
font_01_sfnt_off0000a62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA62E 10624 bytes
SHA-256: 8c6e28cc4291eb38ea0948373a418fa35cf44cf8cecba0cdd85b7dcab7f5a710

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