Malicious PDF — malware analysis report

Static analysis result for SHA-256 422723c46098e6a9…

MALICIOUS

PDF

43.0 KB Created: 2020-10-29 22:37:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7c3799df0ed3ad6af7aaf3170b040683 SHA-1: dca3cf044c71b9b1c70d098c55b70fdd6669c19d SHA-256: 422723c46098e6a9cc096c92391168697ed56550fe20136f1b599ec0e192073c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for crafting content. The presence of many external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=how+to+make+a+ducktape+purse In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_5f927d2a3be68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f9583fa64a32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f97ee7b75325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f876cd7d71b7.pdfIn PDF document text
    • https://tazeviguso.weebly.com/uploads/1/3/4/3/134339516/9255947.pdfIn PDF document text
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/1115681.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/2489884.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/sizadagazagaj/gepotexawelibenajexos.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/54420753107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1cd302-c373-4c57-ae39-171c6ceb2cd5/69590086619.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/55663845534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7d645d-694d-4780-b902-eb1f8805923b/kanixusus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 5304 bytes
SHA-256: 14243023ee032a5018e7c8e529e7f8fc32886d90c6bb9722e40eaa7f3e1bc281
font_01_sfnt_off0000716f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716F 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000079fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FD 10820 bytes
SHA-256: 84eb6fa23d309da73804e3cfca637d3cb49d887e934153e7e9b749dcca5f103f

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