Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f79f2f0483c5e8…

MALICIOUS

PDF

62.3 KB Created: 2020-11-01 08:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d812b1de2d54933b1d540fb4eb88a6ef SHA-1: 3d1d6333c76a41f9bc0dd5c752244d5241d2d143 SHA-256: 19f79f2f0483c5e810d498c24916646fc44b9ace31bba663c6b672f65b4d71cd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to lead users to malicious sites, likely for further exploitation or phishing.

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 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.
  • 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://ggtraff.ru/aws?keyword=sepak+takraw+origin In PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/lowibap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/kizemazuzalimokupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2569/6421/files/absolute_value_worksheets_kuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3567/6831/files/computational_methods_for_quantitative_finance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7673/0017/files/73795894469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9690/8970/files/21707834105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9586/6524/files/lelufatapavoxegimugadab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6807/0309/files/cap_file_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/mevirizaduruzidekuragugej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ee8e33-4cff-4d4b-9f40-cf5b7408709b/41022107916.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_off0000b5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C0 5036 bytes
SHA-256: b3051dc282e9ce9ef375573ff46edd26176f4af3e369090dc0e98a37237fcfa9
font_01_sfnt_off0000c70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70B 11292 bytes
SHA-256: 0d353eae7f6693ef92b469ebee637a22952c71ed8ef3d1257fae1704074a9aea

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