Malicious PDF — malware analysis report

Static analysis result for SHA-256 f322e7f06b2dd744…

MALICIOUS

PDF

44.0 KB Created: 2020-10-28 00:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3149aa27745c286f73ee57fb9925810a SHA-1: b6f1057c9f7debebcdd67567624e174f75ae448e SHA-256: f322e7f06b2dd74441ba23addd53b7c09e62f4c6645b440d15a37ad4cdf13783
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The PDF also functions as a link farm, embedding numerous external links, many of which are likely intended for SEO manipulation or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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://ggtraff.ru/strik?keyword=foo+fighters+big+me+acoustic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f90d3bb245d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f91c922bf4f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f96ff50258c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f94ada1a2558.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/zajupesutizal.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/971bb.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/25afe2ff-1af6-4ada-92de-168307da736f/45978391270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cbee2c-207f-4268-a6ec-01a3302746ce/vekoxatefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8e4e09-f892-41c8-b832-5f93987e9bb9/atlas_brookings_train_tracking.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/46590345750.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/84669576196.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/vomitefi.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/zebuturaze.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/best_book_for_data_structures_and_algorithms_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/12_chemistry_notes_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/edit_file_ke_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/manual_de_reproduccion_animal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a0c9cf5-ccf2-41d2-8b21-32fd9817c8f9/55911073568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b04e24-772d-4f0e-bc55-70ec4c546eb3/81119190398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671968a2-fea7-4cd1-b1d6-3127caad1d81/64276587919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65a277f-e54e-44ff-83aa-4e7a50116d9f/66211262637.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_off00006a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A69 5356 bytes
SHA-256: ae25c8046a5f58be9706eafef898da7e1ac01ddcdf3f2bedbbd0df82ffd15760
font_01_sfnt_off00007c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 11044 bytes
SHA-256: 7013ddd74456858e3dfe761db0be732919dca2645d74eb1c77f2890f8ffd6b5b

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