Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb549e2ff8d92f8…

MALICIOUS

PDF

78.3 KB Created: 2021-04-02 12:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f69d266a670919d36c6846940a0f8bf8 SHA-1: d02d562cc997f01be07492986590014ce4049095 SHA-256: abb549e2ff8d92f86d8b8c0a2b693402e1e098c3b6f0397521af975705dd9c66
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/strik?utm_term=how+to+replace+ink+canon+mx492
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fce626c375f0.pdf
    • https://cdn-cms.f-static.net/uploads/4365567/normal_60359ae26aefc.pdf
    • https://static.s123-cdn-static.com/uploads/4485704/normal_5fe01ce33768e.pdf
    • https://cdn-cms.f-static.net/uploads/4474759/normal_604ad0b73e7b9.pdf
    • https://cdn-cms.f-static.net/uploads/4478655/normal_6025bf23a7975.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/16184aa8-2365-4b3e-a596-b7843bfa0c8e/12777767314.pdf
    • https://uploads.strikinglycdn.com/files/168f6e77-5da9-4881-840a-5f5ab0681527/cub_scout_webelos_book.pdf
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_de75cb67c0cb4e238b1ec9f4a6d03a8d.pdf?index=true
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_2809decf4dc640d2b6cc5fa88a3e5174.pdf?index=true
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_4a38b990d2854ad78729a0ce8ca85671.pdf?index=true
    • https://s3.amazonaws.com/fajixe/19393526697.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_f55bf67eb5b9460ea3c8b3191da792d6.pdf?index=true
    • https://s3.amazonaws.com/nitidadufetenu/deloxazoxibupudog.pdf
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_5f27fe964a5140f2a16aa7995e40f45d.pdf?index=true
    • http://koviwuwe.epizy.com/nowakakiteduxikeguto.pdf
    • https://uploads.strikinglycdn.com/files/8537b2fd-833d-4fc9-b203-2af332d12cfc/duwaf.pdf
    • https://s3.amazonaws.com/kotidox/bootstrap_template_builder.pdf
    • https://s3.amazonaws.com/baxunaf/desutosevanugedozama.pdf
    • https://uploads.strikinglycdn.com/files/c283e43d-68e3-4794-8bee-8d18b9323db7/sinopsis_film_a_river_runs_through_it.pdf
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_eb41b90f85394051b166d9499800cffa.pdf?index=true
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_2bfea2a2c28042d0bddd8d5e7757e606.pdf?index=true
    • https://uploads.strikinglycdn.com/files/35546c52-821c-47d6-b657-4b49db6bdef0/nujofalojusow.pdf
    • https://49884795-3b66-401c-adaf-b59e999553af.filesusr.com/ugd/8bd6c9_5066b2f41d914d4bbf0a61765603b0fb.pdf?index=true
    • http://koriwiginajefet.epizy.com/324405224.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b7.bin
c8e84002a70fd56e8781c8352e8f991584dda7ad71ec72cc673d3463b04aa73d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 5464 bytes
font_01_sfnt_off00010653.bin
4d2171f09a9f7811b131718a0b1e811da36eaef5ceee4429d48059d9dde28745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10653 11044 bytes

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