Malicious PDF — malware analysis report

Static analysis result for SHA-256 759f3c61843c4c64…

MALICIOUS

PDF

73.3 KB Created: 2021-02-26 08:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f5632eda85a3199e70af958446b6bd3e SHA-1: baada2266553fc8b78851b758b14eff4955399df SHA-256: 759f3c61843c4c64508bea1c4f29916e13ce8a4fd4a80171ff3b220fc983e8f7
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or redirection scheme. The ML classifier strongly indicates maliciousness, and the presence of external URIs points towards an attempt to direct the user to malicious content. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=how+do+i+watch+the+stock+market+live PDF link annotation
    • https://wadasowodasi.weebly.com/uploads/1/3/5/3/135316150/rudedatis-jesim-dijumivuwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5feda0845b518.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/IwK1jhf/89097389157.pdfIn PDF document text
    • http://repair-planshetov.ru/pentatonix_sheet_music_book2fv36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496146/normal_600f813ac4ce8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419002/normal_5ffc5992bae45.pdfIn PDF document text
    • https://koxabiniz.weebly.com/uploads/1/3/5/9/135994092/kamuvok.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/jbgyW13/hyperburner_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/ifijNUW/mermaid_theme_picture_frame.pdfIn PDF document text
    • https://megopupe.weebly.com/uploads/1/3/1/1/131163834/zunabutive-bekop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_6037ece514a9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_6015b9b2ee535.pdfIn PDF document text
    • https://tedajurilazunu.weebly.com/uploads/1/3/0/7/130739962/togirevig_kepige_venewawanuben_vejuvipuwomov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465707/normal_60355f835e361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_600896a9d2025.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469831/normal_5fffc2a269b28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AD 5356 bytes
SHA-256: 68999a7dfdaf8b36b8af4d98f5622a43280abc0904c3ad6cf36dcd8585b606c7
font_01_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 11080 bytes
SHA-256: 4943a18c1df60ea339d3309977c99cd670aa702f2bbf380f1ba197c380631a7c

Open this report in the interactive analyzer, or submit your own file for analysis.