Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff4826eddfc6b2f…

MALICIOUS

PDF

75.2 KB Created: 2021-02-16 13:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2e7b21e829cdc5b2bc59336de7b03732 SHA-1: 342c93f1b5e3d359cec0f39e8d4104fb54fb65b6 SHA-256: 0ff4826eddfc6b2f2a464d32d66c8c1d426606d91aeedfd8a465b5dec99ef3d5
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/wb?keyword=where%20to%20download%20visual%20novels PDF link annotation
    • https://cdn.sqhk.co/vesagivara/o4ZlhfL/85379157130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5fc90e975a8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5fda4004c74b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5ff55bd37d66b.pdfIn PDF document text
    • https://kozivusetusi.weebly.com/uploads/1/3/4/2/134234967/2386210.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/joserusedepusofujaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_6019f15cd2780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428078/normal_5ff37957dbb52.pdfIn PDF document text
    • https://lirefabagobaxi.weebly.com/uploads/1/3/4/0/134012393/jeregazaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_5fea09038d41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_60251a3800770.pdfIn PDF document text
    • http://mugamotapaso.22web.org/cyberpunk_2077_graphics_tweaks_reddit.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/vojoxumolakex-pudixoniwatugi.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/7646480.pdfIn PDF document text
    • https://vonewujin.weebly.com/uploads/1/3/1/3/131380349/kiwenufu.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/Dgez3jg/cake_recipes_with_cake_mix_yellow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bizepusozuj.epizy.com/dasibe.pdfIn PDF document text
    • http://sulumasofip.epizy.com/mixed_sine_and_cosine_rule_worksheet.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_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 5080 bytes
SHA-256: d3105c4ce010d75512e6fd00feda63a7553c451a6dc34e88d3daf60f4e37f294
font_01_sfnt_off0000fb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB54 10876 bytes
SHA-256: dc4af25aaa3dd497cb1ad4f3caeb5f60babf6d8ee11a053ff33db1caee06ba5a