Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb242a662682100…

MALICIOUS

PDF

69.6 KB Created: 2020-11-27 07:55:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a255f74bfd56998ed4696a2b3ed928c1 SHA-1: 9cb4e38b6fa25e75a2d1987969246132223f6bba SHA-256: 2fb242a6626821003eb7c4466bb9db32bafe3c9d6dc2a566d54bb40b6d2bae55
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 0.9998

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://cctraff.ru/123?utm_term=who+created+kahoot+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_5fb5d059d9dc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f937dc687408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370307/normal_5f886b26b5a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fa98ce49cb6f.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/db193d3b-470f-444b-99cc-0e3f8dc13246/30675328652.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/sunday_school_attendance_sheet_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/zewibuzofunulizonupugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37972e2e-a312-4dae-94dd-66d3a88d9dfe/ley_180_laboral_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/pojesozok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae2ec9a-fd8d-45b6-a40f-276caf745c59/94506252153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c99064a-3a74-4f30-90c9-1a0283d93b65/numbers_past_a_trillion.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/exemple_attestation_de_travail_pour_un_grant.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/ringgold_lawyer_divorce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828a014a-65f2-4402-a4a7-829a8a267a33/likutey_moharan.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/19080171754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185491f2-d54a-430e-bd67-5d335291be9a/rinab.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_off0000d4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C4 5028 bytes
SHA-256: bd18f1d02b9962c4057fe8ee2ea2a785e78226d89200002c289af1f0ce644ce9
font_01_sfnt_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 10504 bytes
SHA-256: 00627fffd5618d31a38999dbce48e1ae36075611ee0928d396f98678265f14a4

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