Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea401facadff42bf…

MALICIOUS

PDF

49.9 KB Created: 2020-10-08 16:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 864dcaa25105adb710de58d341118cb6 SHA-1: f3c029b9df5e2a270ac1db5cbbf47ae677e2d0da SHA-256: ea401facadff42bf63c7486750eee1f78c6917646b5ff709e0a58df7b247c3a6
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://gettraff.ru/strik?keyword=funciones+inyectivas+ejemplos In PDF document text
    • http://tupogefeb.algomaciofa.org/uploads/1/3/1/4/131453019/wumolevisa-tefidajilate.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/44151336648.pdfIn PDF document text
    • https://site-1042990.mozfiles.com/files/1042990/46055018837.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/lefotevijix.pdfIn PDF document text
    • https://site-1042451.mozfiles.com/files/1042451/weruxekoxerofotukek.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/puvuvibuti.pdfIn PDF document text
    • https://site-1036921.mozfiles.com/files/1036921/62708402631.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/53094510591.pdfIn PDF document text
    • https://site-1039669.mozfiles.com/files/1039669/90479574702.pdfIn PDF document text
    • https://site-1039508.mozfiles.com/files/1039508/gejabimisexalifurewiwef.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/79da6bc2-d9fd-4ac0-a3ad-4eb9eeddc03d/74284861946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c64a58b-7a5e-4d0a-a657-87547c5569c2/dupelorogojafinukavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb26471-b78b-4558-9e3c-7290077ba3ff/46648488710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc473373-2976-4364-8893-127d17dda59d/51395033299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9fbe22-1aca-43e4-878f-0136fee09833/luzigumewo.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_off0000619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 5176 bytes
SHA-256: ebd1f32eb23e5622f04f0b0e922e51c1eb0bfcc21944be980474f1518615b99a
font_01_sfnt_off00007346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 15112 bytes
SHA-256: 6c25e33a41d20749a5d591dfb59fa4db46d2c18377a8553ad0777b5def98f1b9
font_02_sfnt_off0000a263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA263 16520 bytes
SHA-256: 9b85d3d597e98b005cf156b578a71ac12fac4180e725ba8324a67f9f83b4b611

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