Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7afef9bcdbcd20…

MALICIOUS

PDF

38.6 KB Created: 2020-11-06 03:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a3a8397f747c4e8f5299483576264452 SHA-1: d2726bf0f1e14c28f353e496c316e599a7c60099 SHA-256: 6f7afef9bcdbcd20746570e7c61468d05894608b5aaffbc0ed7782ce933e86b9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffmen.ru/strik?keyword=private+pilot+checkride+study+guide In PDF document text
    • https://mepowisa.weebly.com/uploads/1/3/4/5/134595914/golalib-lovatadudo-ridugubiletofaf-fekasepetewudip.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/senujukez-tadaseduvofoka-kedape.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/tizobajevi-dopebulixoni-javomumarilit-roruripofexede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f9db041f10c8.pdfIn PDF document text
    • https://misaxokur.weebly.com/uploads/1/3/4/3/134354007/e89d845665.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bcca6897-83e2-40d2-8c9a-9f7d088d6d36/41716022032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70edec18-aaa0-40e5-a2e1-bb88915cc4a4/48593527547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228f9965-8ed9-4753-a466-5582cc99a64f/96460113380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c913ed-c2df-4d1c-b895-f25b97f4750a/15564081916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea727cc9-91d2-4089-ad0f-201cb745c986/73987410212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc109873-175c-4004-b197-8d55877e81e9/rarusobuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e50c7a-de2b-4cd5-bb42-a512d73ed483/88955732635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9218310a-ae2d-43e4-a69b-c517402b0d33/3557765263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb6f515-84ef-47b4-b20e-9c1e8537c7a2/26667887844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e29377-8a7e-403b-92a6-a3feeffad7d4/texas_shaped_waffle_maker_flip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B83 5340 bytes
SHA-256: 7898e478714affde4d0862fbf219f21ed76b0c9887960622fb1b0dfebf3ca3be
font_01_sfnt_off00005dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC2 9812 bytes
SHA-256: 70ba262f008d544c8ee9c9c171981a9e76e62d92df8916739a7db0b5aa1414a3
font_02_sfnt_off00007f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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