Malicious PDF — malware analysis report

Static analysis result for SHA-256 c599a99f0d679405…

MALICIOUS

PDF

42.2 KB Created: 2020-11-07 21:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 65c345cd2148304902d9d990f11274c1 SHA-1: e1e2c3d539651e854771b8df0dc6a9ffea55da09 SHA-256: c599a99f0d679405118ef7f9dc0f7f2713d2f9ec6deedfda3b8ed5541eda1e7f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://traffset.ru/aws?keyword=slotomania+free+games PDF link annotation
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/kisoneje.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/6672880.pdfIn PDF document text
    • https://lofivate.weebly.com/uploads/1/3/4/3/134307733/subagunapig-puzobopewil-biborapezudawo-feputakef.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/fc2cfa3b217.pdfIn PDF document text
    • https://tebixuku.weebly.com/uploads/1/3/4/5/134595315/wipuzawaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f8e09402597f.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/8604804.pdfIn PDF document text
    • https://jutawalafomas.weebly.com/uploads/1/3/4/3/134316275/96cdbbe8da13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nuzobelesuli.files.wordpress.com/2020/11/96332251511.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://zanamofaxo.files.wordpress.com/2020/11/37544428964.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/metaxapidigoti.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/indian_constitution_in_odia.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_off00006543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 5188 bytes
SHA-256: 6cc1f05168c919ffc2521922c3c6fee4d1b3bd755c2f0687a44b70ca4622fb38
font_01_sfnt_off000076d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 10932 bytes
SHA-256: c49e346f064f98b3c326fed54870eee57c7102bdfb1b57388ccde6346aa6bbc4

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