Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b620b14eb21e22c…

MALICIOUS

PDF

48.3 KB Created: 2020-11-06 18:38:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 21f6763c2647da337a3bb9cfaba579d5 SHA-1: e608447746c14b14440f93e80e843cc26b79122b SHA-256: 9b620b14eb21e22cac6851b66970011948ef6bae0e3bab65ee5bd3ebb81cf4c2
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/aws?keyword=silent+hunter+3+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f9198443d328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_5f994b339004d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5f92572788b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5f958e8c0da76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_5f999bc42b385.pdfIn PDF document text
    • https://bodadesoka.weebly.com/uploads/1/3/4/2/134234706/be2b4636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5fa33e37e0024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f97e86ddc4c0.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/wejarelezagukazadi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gumagabu/19508678140.pdfIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/achieve_anything_in_just_one_year_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda91a58-a99f-458e-bd90-71e10a41c2f1/numilozasenegejadaken.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/william_rodriguez_md_austin_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/vba_powerpoint_group_shapes.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_off00008267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8267 5016 bytes
SHA-256: 045d6cb2b8a5f9ad3a2acd35cfbf7522573b18cede577052a2405a26e92bce8c
font_01_sfnt_off00009343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9343 9852 bytes
SHA-256: 2dc15af240567660ff80ad0d3d5d3bf1bcca6cc72375cdd755f95158db5a6ed3