Malicious PDF — malware analysis report

Static analysis result for SHA-256 599e7bf6196542bd…

MALICIOUS

PDF

70.1 KB Created: 2020-11-30 05:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e2e55a575ebb593454c94abcd95db352 SHA-1: d78af5a95aa09f11f23a4966c030f9d4aed73c0d SHA-256: 599e7bf6196542bd40334204fe882ca11c33b9a4129cfeb0dd649eb019da4712
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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.
  • 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://trafftec.ru/strik?utm_term=middle+east+cultural+cluster PDF link annotation
    • https://gekilatati.weebly.com/uploads/1/3/4/3/134378061/nibufiliz.pdfIn PDF document text
    • https://didowivukosu.weebly.com/uploads/1/3/4/4/134470318/zugapurozuzedivoda.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/5276201.pdfIn PDF document text
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/sumexosutopakojaxoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f8899eecdcd9.pdfIn PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/3060232.pdfIn PDF document text
    • https://kezozebajex.weebly.com/uploads/1/3/4/2/134265808/6962419.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/66a064db-048f-4dd2-b1ea-0e158d2ae06d/jogutasexitajapoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/atlas_map_of_india_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102057cb-03cc-4fad-9907-b0d66c0c2d56/22880613432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c428770c-ab0a-4b2f-8e1b-8d63591e33f5/vukutipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1505966-5f6d-4413-876b-4fde460422bc/comcast_st_augustine_channel_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69401b78-98bb-457b-89ec-3360e8dc3a23/46331301362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741a09e3-f6b6-47c0-9d84-f5826a44d34f/aceite_de_san_jose_preparacion.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_off0000d6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EB 4940 bytes
SHA-256: cd9899836321a7016435b9f519e43e5a7c0c4ab4ec334833e154f111353c304f
font_01_sfnt_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 10384 bytes
SHA-256: 05bfda429c90501cc355f77a5c1a9e7a2db9c39f90a42739883c0ccab1344b25

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