Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e9f1c1b5d60668…

MALICIOUS

PDF

47.2 KB Created: 2020-11-09 03:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 43abeb73e6f753e35973271fb4566a41 SHA-1: f129a6e4de945f4a88066698f5709cccea4e5707 SHA-256: 06e9f1c1b5d6066812b4742c261fa5313765b6a2ce334b08067a8eb83ace9f00
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://trafficel.ru/123?keyword=alfred+hitchcock+lamb+to+the+slaughter+vimeo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5f98cff2e48ed.pdfIn PDF document text
    • https://kijudizi.weebly.com/uploads/1/3/4/3/134321523/149123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f99c662b97b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://milosibad.files.wordpress.com/2020/11/95519634708.pdfIn PDF document text
    • https://kakutojuzi.files.wordpress.com/2020/11/catalogo_mary_kay_noviembre_diciembre_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/59668143329.pdfIn PDF document text
    • https://sekusiwek.files.wordpress.com/2020/11/jeluxige.pdfIn PDF document text
    • https://pelidowumuwi.files.wordpress.com/2020/11/guguruvufojotaxodud.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://rekukep.files.wordpress.com/2020/11/jagureragapu.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/62557050542.pdfIn PDF document text
    • https://supafewaseg.files.wordpress.com/2020/11/figos.pdfIn PDF document text
    • https://gafasejek.files.wordpress.com/2020/11/19040874152.pdfIn PDF document text
    • https://demoxugu.files.wordpress.com/2020/11/63796454631.pdfIn PDF document text
    • https://sejopaguvit.files.wordpress.com/2020/11/30366305091.pdfIn PDF document text
    • https://konomalipu.files.wordpress.com/2020/11/4245735901.pdfIn PDF document text
    • https://wusobosujiru.files.wordpress.com/2020/11/18001759012.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 5464 bytes
SHA-256: d1684702681d44692fd76b7456df72efa54ecd7a8eb16c54898bff57b3ea608f
font_01_sfnt_off00007c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 10928 bytes
SHA-256: fbd5667c15c697a3b22fc17eb7fa43eb010973e0515533155f35793f475fcfbe
font_02_sfnt_off0000a172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA172 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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