Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3ae4cdd6d199f8…

MALICIOUS

PDF

39.9 KB Created: 2020-10-03 18:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: fa5b8d05f92cc344447caaa0b28b7c2c SHA-1: 70ee4b1d0b3738906d1c49263b3736440bc946bc SHA-256: 4f3ae4cdd6d199f88e9a3e58a13cdda5ec65a0caa6d5a101c86057d033558b4e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/pify?keyword=xenoverse+2+character+build+guide In PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/bilumanokazafol.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/gosakiratolimakedalagufe.pdfIn PDF document text
    • https://site-1038363.mozfiles.com/files/1038363/58656681868.pdfIn PDF document text
    • http://files.destinationsbydes.com/uploads/1/3/1/8/131871705/taganodesufi_tejubesezajado_luzorutugurod.pdfIn PDF document text
    • http://tedupoj.thepinkmixingbowl.com/uploads/1/3/1/3/131380942/lolotek-zofetoso-ligofiniduveze.pdfIn PDF document text
    • http://kugojar.tonisenatore.com/uploads/1/3/2/3/132303286/9092703.pdfIn PDF document text
    • http://files.sallosupply.com/uploads/1/3/1/4/131453013/8399757.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/79771493435.pdfIn PDF document text
    • https://site-1038915.mozfiles.com/files/1038915/finum.pdfIn PDF document text
    • https://site-1039209.mozfiles.com/files/1039209/turalapenedoxakigikekoxin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7968/4262/files/unblocked_games_learn_how_to_fly_2.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_off00005db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB2 5508 bytes
SHA-256: ecf1076ff631cdeb0edaa826b973aec0ff176a499154d42b1d1fd426c5476feb
font_01_sfnt_off00007068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7068 10196 bytes
SHA-256: 28c7ae7e4fe9016107e3b120cc8ed570bcbdf64db8162f9cf88d58ba56c15589