Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef380ff8ce9ea41…

MALICIOUS

PDF

38.2 KB Created: 2020-11-06 05:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f0e75fad8dadecd009c65b10dcf55ab1 SHA-1: 2d11ab9142919db2fba340957e6baf0f85be0f46 SHA-256: 6ef380ff8ce9ea41e53f5e0ab61bceb6abedf06ccd3e41139b309572fbdffb27
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffine.ru/strik?keyword=manchester+ky+news+clay+county PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426549/normal_5f9a21cdcf286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f9e3d64aa958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8ebb3a1c8e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5f903e3d04cbd.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/nasulufakuvavog.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/7378743abb3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5f8d9890cbcec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446650/normal_5f9e573ad0bfd.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/batoragubukepo/law_and_order_svu_scorched_earth.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/arcade_games_addicting_games_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/67027300353.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/razoje.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/sas_enterprise_guide_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/minecraft_build_themes.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/wentworth_elementary_school_reidsville.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/wejolamorugufenisuba.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_off0000562b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x562B 5148 bytes
SHA-256: fcdc2445bda8be6ce3bf71db7a70e6b3dc6645312e0a6c28eef34194ec93365f
font_01_sfnt_off000067c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C7 10472 bytes
SHA-256: 1af5ca0c9145cb07322727331f861f25c1ab95367544ad92b08113e4ce61a4c5

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