Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66177d29bc3c357…

MALICIOUS

PDF

48.4 KB Created: 2020-10-27 18:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0240cb4fc122c3fb13411d7202be641d SHA-1: e58716112a403ff7481d5780a157e9cda6afc0bb SHA-256: d66177d29bc3c3577c0d6886c30eca108a3a63d16d19d5db3a23c6b4932610dd
124 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure the user into clicking it. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=youth+soccer+coaching+philosophy+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5f973aa0d4015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5f8fb285621fe.pdfIn PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/c4e34.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/6976157.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/pewiredegaka.pdfIn PDF document text
    • https://xutewosabog.weebly.com/uploads/1/3/2/3/132303209/6005757.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/d872df2681.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/leteraxewe/popimisivinovodadi.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/83635650217.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/charles_schwab_ira_terms_of_withdrawal.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/clear_score_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/pdf_split_app_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/mamrie_hart_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/25384057150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0520/9499/files/rigigefalokejevub.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_off00007cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD8 5476 bytes
SHA-256: 7d3287a9f1fa360bef7a32dc8900c5ae131378cd202a687c52b44fd8e331c529
font_01_sfnt_off00008f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F62 11104 bytes
SHA-256: 98654d173723544488033567ed4d8a9815b700b75b658ae77961701f0dd96c6b