Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee4ae5dad1e2155…

MALICIOUS

PDF

148.7 KB Created: 2021-05-03 20:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bca49ef7524a2693d943622009a0e687 SHA-1: d5c700ee3ff5aa03ecd186f1c2cf74b5dd2af2fe SHA-256: fee4ae5dad1e2155ea3fcac1a15a86a03a45ef0fd5bd0c3a1d6be581b86eefb1
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of many external URIs suggests an attempt to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://xezojetit.ru/strik?utm_term=the+hobbit+an+unexpected+journey+release+date PDF link annotation
    • https://cdn.sqhk.co/biserodafed/eVhd4lW/ninja_blade_movie_2009.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/kumejumesemejojogugu.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/gcGe5id/kodaxofefitap.pdfIn PDF document text
    • https://kukefilatisila.weebly.com/uploads/1/3/4/4/134498126/dowamigebereve.pdfIn PDF document text
    • https://wikafifej.weebly.com/uploads/1/3/2/8/132815388/finalufuluko-kowabogax-bareladezudesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_5b27de2b60784ef9b648607267702920.pdf?index=trueIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_392e341e5c744c0c910588e07ac388b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b1d0d7-0d99-40c2-a4c2-aeabfce4e9fb/what_is_the_best_side_by_side_2020.pdfIn PDF document text
    • https://e37fb4d6-fac4-4cb1-96d9-cce2dae532e5.filesusr.com/ugd/ed2751_e6aa1086ad7c41aeb840f4f662bca52d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/84015687972.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/30932849555.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_af0fbd99278044b9875568e80b9942b1.pdf?index=trueIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_acd8a44cec294f51b2e58de9595f7f66.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8082133c-efab-44bd-bc56-933b4141b220/82167902236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7239def-f88e-4c89-a6bd-76499894b6af/71211966670.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_8b8dadedbfc74073a8c03a83e0199a04.pdf?index=trueIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_43944f39d51a457da622984c45ed73f4.pdf?index=trueIn 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_off00020658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20658 5496 bytes
SHA-256: 368bc38ae21ef3c6b99bed26c733741d55234d502a3f7c1fda3fa9aa7a8eec14
font_01_sfnt_off00021902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21902 12864 bytes
SHA-256: 96e200c478449711332ccfbf235938f166d2f884574ad610c34cde3499d85708

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