Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae994658f22a97a…

MALICIOUS

PDF

100.4 KB Created: 2021-05-26 16:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e001108c8f960bfb5f1dd2b5a96e85e8 SHA-1: 972b098236eaf17bf7c4fbe1d54c24637353a197 SHA-256: 5ae994658f22a97afa149f19ef607fdb39dde55111cd233a58a5016fb0a0624a
156 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 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 0.9997

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
  • 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://jottigo.ru/strik?utm_term=porque+se+hacen+piedras+en+la+vejiga PDF link annotation
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/tomoxafexozi_fubidobexetit_rawapikoxi_zivedinak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_6021730f6ed39.pdfIn PDF document text
    • https://tejisapaw.weebly.com/uploads/1/3/1/1/131163851/e530dc85283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_603a67d87b8a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476566/normal_5fd0645ab3063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_6017f6a3f3c92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5ff8d3bd48f37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464053/normal_5ff5ddbc2472e.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/8a2e93f9-6d34-449f-b65b-37c9f8d3b07a/bavupeboxuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dd1668-da5b-4e26-851b-48ce4fe9bce2/tokegikubemamiduwajabix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b7dce18-8b5d-455d-a1f6-a4766671c4e3/17297241814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4638a1-229b-4f0f-960f-a039fc6ce95c/pigoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5539bb1a-5454-4cb0-8893-32bbaa713ed7/mubokepolix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62be3abd-7672-4764-a9f7-78e65e475b79/twilight_all_parts_hd_download_in_hindi.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_off00014823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14823 5600 bytes
SHA-256: 85cc4a0eee8eee2311be03e9366195bc098a604c77289ad3d96a19a818c1bb7c
font_01_sfnt_off00015b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B2E 12576 bytes
SHA-256: a8de55d338fb5e16deb507045a4745d8a3b9a3e0077d34439951c08fb5b23b77

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