Malicious PDF — malware analysis report

Static analysis result for SHA-256 758c5ae6ef5dc991…

MALICIOUS

PDF

47.6 KB Created: 2020-11-03 02:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5d375822c60e35b15ca257d8e50ab78e SHA-1: 91382d572e9cba6c8da862cb11788634b6eff457 SHA-256: 758c5ae6ef5dc991dd30fad00d246826d0f9da926f345fc934ab768595729c3c
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. 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 3

  • 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.
  • 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://ttraff.club/123?keyword=swink+high+school+class+of+1968 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5fa06f4915682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5f9e74267633f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7ce744-3d07-449e-a8cc-009bb8a85aac/71573398581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ca11e4-eefb-4bad-9256-860caed04c12/tozexozotan.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/94470069161.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/97614487384.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/26436713735.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/surah_yasin_quran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38de725-75fc-405f-8594-e7fd5880c7b7/21731664906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ab3d29-fada-41aa-8082-37c16cc4c078/pewegazarorufu.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/82853808176.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/windows_7_ultimate_usb_drive_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4c52e6-dbe1-4fd3-a8c3-9c23ea39cab4/1957328851.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/nolanekiwi.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_off00007716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7716 5860 bytes
SHA-256: 801ecdcece9c45c9a05dab4fb23a3750b385800cfeff7afab25e049132a3421a
font_01_sfnt_off00008b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B27 12112 bytes
SHA-256: fdae91582effd4035b3d1c3ae8e291ccf0f3d5dd0da27ee3382559f9e6e05e8b