Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4580f16f3ae3f42…

MALICIOUS

PDF

36.3 KB Created: 2020-11-07 12:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ab2e819a990aa9971da75a045c6a072a SHA-1: dd0d3c19a944e093c747f5a29a1df9a475f4ed94 SHA-256: f4580f16f3ae3f42c69a3c6d8404f98fd75ce88898b42b83bb9acb193b877ff7
116 Risk Score

Malware Insights

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

The PDF contains an embedded URL and lures suggesting credential harvesting or a payload download. The 'SE_MFA_LURE' and 'SE_PASSWORD_ARCHIVE_LURE' heuristics indicate the document is designed to trick users into providing sensitive information or bypassing security measures. The ML classifier strongly flagged this PDF as malicious, and the embedded URL is a primary indicator of a phishing or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?keyword=open+itunes+account+login PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444655/normal_5f9c7592cbaa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5f93fe9cf3fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_5fa2e33407db4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5f8f3da04ad7e.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/f577227d-9cf9-4c00-81d1-ed177e3c4ab4/the_great_debaters_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737c800f-4575-4361-97df-13c3f167d0ef/giraze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7c484e-18b4-4373-b0bf-f2823ce3fe45/karusajuzagixutawiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc93872-fa37-4f28-b062-1b874c719621/49038602398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30fc89ba-10de-41a5-8fc3-0319832ac13f/64830486187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f90ecb-05bf-48f3-9328-2994f05dd30a/jijorulebepedid.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_off00005223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5223 5032 bytes
SHA-256: 681a31510a4ac56d2df3fb22ebe2e1b4cd57f9623415ab7ac86649c3548a048b
font_01_sfnt_off00006355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6355 9896 bytes
SHA-256: 7ca0b1c81b3c4d019e672ce05f1bf0f9029c0566d8bc5df973b0823720301486