Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b4a3f25b269726…

MALICIOUS

PDF

49.5 KB Created: 2020-11-04 05:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6170a47ab09ff68e7a8a4badf3e6119a SHA-1: 28c91af96d8d6e1f4ff3c6727038fef004217ea0 SHA-256: 57b4a3f25b269726d838fc4da2b1b1545352c739c02b2d73f1330c18695fd009
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses a fake browser/software-install lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=simmons+bank+workday+login In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f9f028881166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f883886931f0.pdfIn PDF document text
    • https://wufenimikefi.weebly.com/uploads/1/3/4/3/134366244/gomigavidajato_vufibifibosoxi.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/7a080364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8a769cb4e34.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/kelukakeb/73059467735.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/krypton_electron_configuration_longhand.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/nursing_care_plan_interventions_for_smoking.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/11258256533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4f4419-6de6-4262-8e61-4f2e154ffff6/99568986194.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/louisiana_state_tree.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/lonely_planet_japan_15th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/18766247035.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_off000061b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 9524 bytes
SHA-256: 5612caf3dd344b4b25e47eea2b00cee06d872cfd16804a494b63f49f5d53190f
font_01_sfnt_off00008173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 5644 bytes
SHA-256: 8fe941ecccbaf36dbb558c7575125d5159845a6d1125de109951593cebc69466
font_02_sfnt_off000094a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A8 10636 bytes
SHA-256: d872c210f01607b5114eaeeaf2684f9d026b95c940df8119275ed713b3ccefe0

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