Malicious PDF — malware analysis report

Static analysis result for SHA-256 58661092c993b2bb…

MALICIOUS

PDF

56.2 KB Created: 2020-11-08 08:35:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2cc8726b6de60569e6219381e4fb9ab0 SHA-1: d5aa58c84b735b4d9b6a2b5bf2444a520269e618 SHA-256: 58661092c993b2bb97d1637341f50f090f205910a4faf00c07b9f32d1938d77a
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=watch+jack+the+giant+slayer+movie+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5fa6da1494047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8d9600943ec.pdfIn PDF document text
    • https://tuderosuf.weebly.com/uploads/1/3/4/6/134652240/wefekufexesawe.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/wezepipo.pdfIn PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/tugupataxatape-tewozogure-vupevel-jekuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_5fa0d3633077e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419413/normal_5fa65b6c96710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f8748ea44a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f8b375001c0a.pdfIn PDF document text
    • https://gugukufetufa.weebly.com/uploads/1/3/4/3/134337187/vekegegagitev_jibezow_ludobedabumo_pasasirokan.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/taturi/hp_pavilion_32q_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/wupufudexobuvofo.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/list_of_extreme_sports_fun.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_off00009bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFC 5528 bytes
SHA-256: fce9e0bcb698c646a669a796bcde47e256081369db7d8629959ae818ba61d36d
font_01_sfnt_off0000aebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBC 10716 bytes
SHA-256: 9778e44807bb3010278b75c831bb4a1ddc3553d876678518a91bb8ca0599f53c