Malicious PDF — malware analysis report

Static analysis result for SHA-256 0875b705ff40b146…

MALICIOUS

PDF

74.2 KB Created: 2020-09-30 02:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1d3d80dba9c8829de3fc9396a47bc7af SHA-1: 3b0c2a732e73ae57f6662b79fb680e2578b9028c SHA-256: 0875b705ff40b1469c70c029caca477331399fb162c0ac4432d3bbd8e6fd2046
134 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a password-protected archive lure suggests an attempt to bypass gateway security, and the embedded URL is likely part of a multi-stage attack. No scripts were extracted, but the document body and heuristics point to a redirection-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/strik?keyword=bylaws+example+pdf In PDF document text
    • http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdfIn PDF document text
    • http://files.obrienclan.com/uploads/1/3/1/6/131606331/gedinodu-sajufomesej-wegudisurej-kaletibaluz.pdfIn PDF document text
    • http://kezamave.monarchglassstudio.com/uploads/1/3/1/0/131070351/wetefisumajisejox.pdfIn PDF document text
    • https://site-1037849.mozfiles.com/files/1037849/xejepasibumake.pdfIn PDF document text
    • http://files.sjvkailua.org/uploads/1/3/1/4/131437948/1f63444f7ad5aa.pdfIn PDF document text
    • http://files.davevyespiritualmedium.com/uploads/1/3/2/8/132814241/8087496.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/1/0431/4575/6821/files/unity_game_engine_for_android_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/semenibaratozagaxavaniv.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_off0000e5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 5404 bytes
SHA-256: b0e411fe815aedb03aeb598814b940a20d32c03a98fce6d3d3673cd341c2e04b
font_01_sfnt_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 10520 bytes
SHA-256: 2b1750407eb6c5c2665aca0ff7c36d900569ad644fb6e9c8ce825afb28b6f31b