Malicious PDF — malware analysis report

Static analysis result for SHA-256 892a0239d5572d28…

MALICIOUS

PDF

44.9 KB Created: 2020-11-09 06:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c10c5b62e4f8e7dad1260cf34487752a SHA-1: 5b69c78a090740554a9977616463ae2207cbfce8 SHA-256: 892a0239d5572d28b596173f3cf5fe74bf4c59556486f515284754c524b31fef
66 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a malicious domain, likely as part of a phishing or scam campaign. The ML classifier strongly indicated maliciousness, and the PDF's structure suggests it's a link farm designed to obscure the true destination. The document body itself is heavily obfuscated but contains the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffnew.ru/wb?keyword=the%20way%20of%20shadows%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f8a8386237aa.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/suzixegazunow/49915104574.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/96707795640.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/jolowikivofiweguxazogilub.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282f0c5a-b0f1-462f-8743-8b08b9b01ef8/80980738300.pdfIn PDF document text
    • https://kenaribik.files.wordpress.com/2020/11/436326817.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/lutepajonebiropanelatib.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a04524-12e0-4490-942f-51b6382e3a9e/54998136678.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/puxonijugijatub.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://samadotesem.files.wordpress.com/2020/11/lalogupujusosa.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/makalah_standar_akuntansi_sektor_publik.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_off00007009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7009 5144 bytes
SHA-256: a476269d09617d69c7c237c79a6dd2a379bec0487444536b8810602f3f1dc76b
font_01_sfnt_off000081aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AA 10412 bytes
SHA-256: 8828297f32bc4edb987602683686664590ee333fa1236c441cc3d904f4842275

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