Malicious PDF — malware analysis report

Static analysis result for SHA-256 e515abb24b0faf3f…

MALICIOUS

PDF

69.9 KB Created: 2021-01-04 16:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ca0286b285b37d7b1b553656fb90dfd6 SHA-1: 70b1fb5182124afb7ca8b25b813b5578045d7a7c SHA-256: e515abb24b0faf3f9d1c1548721947e363fca41dae928f8b2f87fc299f1a1a4c
184 Risk Score

Malware Insights

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

This PDF file contains multiple links designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged this PDF with high confidence. The embedded URLs, such as 'https://traffine.ru/aws?utm_term=country+violin+sheet+music+free', are likely part of a phishing or scam campaign to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/aws?utm_term=country+violin+sheet+music+free In PDF document text
    • https://digufotunu.weebly.com/uploads/1/3/4/2/134266503/638941.pdfIn PDF document text
    • https://cdn.sqhk.co/fudixaxogub/fidFWG3/fishdom_playrix_free_online.pdfIn PDF document text
    • https://benarejara.weebly.com/uploads/1/3/1/4/131407695/jomesotojomojusen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529087/normal_5fc9456ad3cdf.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/4618019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_5fd67d1960629.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454182/normal_5ff0bb41d8876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379971/normal_5feba37a1fd86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_5fd6ae467e96b.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/sixenogafopoj/39839201131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9523ecc0-8aaa-431c-b532-a2482776a3dc/62500034824.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_off0000d642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD642 4980 bytes
SHA-256: 4f44687807e02849f2174e802d903b27ed5e7d2966eb75555b761e397fabfcc4
font_01_sfnt_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 10620 bytes
SHA-256: 07216e3710df8810d3c8f2c5cf7d5f933031ba4da58cf0b0ceff539621a65fa1

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