Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c6560a930aca95…

MALICIOUS

PDF

42.7 KB Created: 2020-11-08 02:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: aeed7ab7316e397a73d9b497ba569f9c SHA-1: aa3756020eeca1c00b9a43fa5aa33f4682e5fd8f SHA-256: f2c6560a930aca95dae7a236aaa5d3b41c4c185230abdf0c6eacf28c7516fb2c
136 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=the+christian+delusion+audio PDF link annotation
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/watobalujolezu-nekerafowedij-pekeg-sibutofejebup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f9971eb9274b.pdfIn PDF document text
    • https://tapojofam.weebly.com/uploads/1/3/4/5/134518610/82e69e9c4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006a1d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006a1d.bin)
    • https://s3.amazonaws.com/bofake/contaminacion_atmosferica_mexico.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/madelizopididam.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/function_not_declared_in_this_scope_c.pdfIn PDF document text
    • https://pufewureda.files.wordpress.com/2020/11/gikosozatajalomiginex.pdfIn PDF document text
    • https://memitapi.files.wordpress.com/2020/11/46047411952.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/target_market_analysis.pdfIn PDF document text
    • https://rixitojag.files.wordpress.com/2020/11/xaredexaj.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/classroom_management_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/75093885927.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/36484927883.pdfIn PDF document text
    • https://danelarumade.files.wordpress.com/2020/11/mizumilimam.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 extracted file (font_00_sfnt_off00006a1d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1D 4976 bytes
SHA-256: e0a55d64ed599e1ff677c5d572de8e571eaf537538d65d689f60e2ae175bb570
font_01_sfnt_off00007afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 10324 bytes
SHA-256: ec09b0818a1f9ac5b1d46f9733b3ab0cc0198a4059d9e3e9f35b01b9181c305a