Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ece719366c65ff…

MALICIOUS

PDF

44.4 KB Created: 2020-11-08 22:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 097926bc57b6b9a0e0a099b56fb65cd5 SHA-1: 0361de3323a9b71c3d100ce7e9b4316bdc568f0d SHA-256: 39ece719366c65fff18c387279f415163a04ac2d6c796c30310d32fd92cb2e9a
126 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.
  • 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://traffset.ru/123?keyword=is+oedipus+a+victim+of+fate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5f9ad47175ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f90371ca6eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_5f99bb2a77baa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_5f972d6e96381.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://jozikixoxa.files.wordpress.com/2020/11/86569104578.pdfIn PDF document text
    • https://zaralukaz.files.wordpress.com/2020/11/hearthstone_android_gameplay_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/juzerilem/panitowofonaz.pdfIn PDF document text
    • https://podawigiwoko.files.wordpress.com/2020/11/46514913863.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/sajix.pdfIn PDF document text
    • https://tirutijupez.files.wordpress.com/2020/11/kobogapofadusadi.pdfIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/bidopi.pdfIn PDF document text
    • https://modiginofom.files.wordpress.com/2020/11/36512300208.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_off00006e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 5172 bytes
SHA-256: 996c3b7c21a133c635b58c04bee7356b7aed5a1913ecf26d47ddcb89ab769167
font_01_sfnt_off00007fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBD 11004 bytes
SHA-256: 78267588dd78d4c9374e8f75f9bc34c2e280154182f17a34bd0f34398985f8ac

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