Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49deae83c21673a…

MALICIOUS

PDF

75.8 KB Created: 2020-12-29 14:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: eb114fcd1790d66ccee3afcc10892159 SHA-1: 6e305a6cf3b6be4635b481bbc43c354a3b345510 SHA-256: e49deae83c21673a97e75812d14a18a900dcb3f4518bfc44625fd532ce0b6091
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with heuristics indicating it's part of a link farm and redirects to known malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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://ggtraff.ru/wb?keyword=sdg%20goals%202030%20nepal In PDF document text
    • https://divupamafotot.weebly.com/uploads/1/3/0/7/130739309/88a2cb2.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/jbjfhaI/42017411885.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/25bc0524621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f878de9a46af.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/34d13f78-00af-4efd-8918-a1f92f5098b2/the_glass_house_tapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94dbf29a-3128-48f9-bca6-41ff613e8821/baby_carrier_cover_diy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6639e66-f2e9-4e67-9dc3-1aadf8dd21ab/solving_multi_step_equations_with_fractions_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74405c1e-df69-4067-b0c8-afe7d70e5a01/34061262555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17cc18eb-4df0-461b-97f1-30233aea5f9c/material_weight_calculator_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc11131-d9f4-4f42-8f18-59401fc8d0b3/416513909.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_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 5572 bytes
SHA-256: 7460fabfd0b7202c7a2d231899fa5d052821b32b29afeba94bfb396f64ee11bd
font_01_sfnt_off0000fda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA5 10828 bytes
SHA-256: a3c2fa5c200da6396090e68f2df123f75ad7f464036164e7aaaeb6d4a3f337ea

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