Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20918cbf19c22d8…

MALICIOUS

PDF

36.1 KB Created: 2020-11-09 02:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e64bc1b70dedb665a0ca993a12ee73bd SHA-1: dea4505b7dfb08342915fb45b6c4d4f50c19ce64 SHA-256: c20918cbf19c22d8a89302c5284bf1197140ae49e4401bf1991050bd36a3687c
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffmen.ru/123?keyword=public+speaking+midterm+exam+answers In PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/sajototomutovubu.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/lexoku_wareto.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/wilafifetijedo.pdfIn PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/3903686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5f96ef21d74f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/970a0498-13d4-44cd-966a-3a40a5a42554/34515596996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27391515-7977-4b67-94d1-51d0526f67a5/janedixupisaluvigogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a82e6dc-a744-471b-8831-e8e630e633f5/proform_750_treadmill_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9663d3-bbff-4f32-88aa-2c186fd8c7a5/85272104470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd9b6ebd-ef7c-4445-8810-12ac09ffc3d2/gatemefenapelujinakubujo.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/statistical_process_control_fifth_edition_john_s._oakland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d500e2-38b4-4883-83a7-84c266d375fe/nanuxotumuxugi.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_off0000434a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x434A 5528 bytes
SHA-256: 93a12786944c19469736bc88f466462f4a7babdc8d174b407d587cb584313a6b
font_01_sfnt_off000055f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F9 9308 bytes
SHA-256: f680e951234de7631ebcc289d04e66e887fde5dbd1747a2940afe837c59cba38
font_02_sfnt_off000075a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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