Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77d880edbc511d8…

MALICIOUS

PDF

74.8 KB Created: 2020-11-11 07:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b0fb3d8536108ccd8e2d8345ac8623e8 SHA-1: dc5fac418e9223ca87621fdf50bf3375f9aa3146 SHA-256: e77d880edbc511d8fe5c14ef9b414c1598d2775dfaa88c174e94d131d357969b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/strik?keyword=jumong+golden+pass PDF link annotation
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/5957094.pdfIn PDF document text
    • https://javogukurajukip.weebly.com/uploads/1/3/4/2/134235542/fd2607e4cb4e.pdfIn PDF document text
    • https://tokenabasefegaw.weebly.com/uploads/1/3/3/9/133999291/882d96278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f90987a1545e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384316/normal_5f8e6593e985d.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/xedoxonogar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f8742a5273d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_5f9bed62b5c08.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/henghuili-files/85122700852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9265c8-4377-4e63-bda5-c69b8cbb82c4/xijevavolodan.pdfIn PDF document text
    • https://s3.amazonaws.com/kepevipawit/showbox_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2296af4a-c9d9-4c0d-becc-ad28e8b1935a/68593215288.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_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 5172 bytes
SHA-256: 8c7bdb6c810f6fa56f23078b63079ec2ad5dd7f6e2a433385240b19b75c3487c
font_01_sfnt_off0000f86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86A 11068 bytes
SHA-256: c2cb127a42588062f7cdd6c193c77fb67923ce53b5a60b074801340840ad6688