Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc756c4d043da270…

MALICIOUS

PDF

70.6 KB Created: 2020-10-04 13:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b7302b218821f621d73a27681bbd3823 SHA-1: 6312a7e93705a8ba9e9487f9faa92dd8554d517e SHA-256: fc756c4d043da270eb85182600624c025038e10004677f2149b5cb63f56a6b38
124 Risk Score

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 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.
  • 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://gettraff.ru/strik?keyword=exercices+sur+les+automates+programmables+industriels+pdf In PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/34044534326.pdfIn PDF document text
    • https://site-1040032.mozfiles.com/files/1040032/19474377914.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/2687184728.pdfIn PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/jufenozanup.pdfIn PDF document text
    • http://subivofij.prcawa.com/uploads/1/3/2/7/132741508/4300006.pdfIn PDF document text
    • http://files.jaysconyers.com/uploads/1/3/1/4/131483391/setexajobuneropovawu.pdfIn PDF document text
    • http://bijub.campcrescentmoon.org/uploads/1/3/2/7/132740228/segijizabigogofij.pdfIn PDF document text
    • http://files.hend-rx.com/uploads/1/3/0/9/130969775/2e31c1e.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/a9beed2a-8b99-4f33-b2de-bf16d8a2b3bc/33700551209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2485e7d-7327-4860-9069-e732148e04ae/86663077791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2e616e-6cea-4e21-ad14-255eecdfd99a/53128125379.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E69 5640 bytes
SHA-256: 6aa937a38c2c9b9be2bcaf777a0d661858f8258c4c015cc15eed87cd8f934fcf
font_01_sfnt_off0000b186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB186 25248 bytes
SHA-256: 5cc8a3852add06a24cab05a4566b6f0cbbd44036e514a3621ff0a74623e8d402
font_02_sfnt_off0000f7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B1 16096 bytes
SHA-256: fadbcb98d8f1d62e9813a7609f5fb4a164c0f07ae0437f2e84255f631a10dc0d