Malicious PDF — malware analysis report

Static analysis result for SHA-256 45acae6a7d755046…

MALICIOUS

PDF

74.5 KB Created: 2021-02-24 23:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c2e3a84cfe21b632683b7d8dd25657c7 SHA-1: d1ad37ea7aa7bb74f34d5e6a892859a5607f0430 SHA-256: 45acae6a7d7550461e95a09835b21cebb5f7c038b12eeb62d715252d5c0e61e3
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://crophysi.ru/wix?keyword=where+the+wild+things+are+free+download In PDF document text
    • http://worelimupuvefam.mywebcommunity.org/cannon_landmark_fire_safe_costco.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/Bhilugj/lovecraft_country_trailer_season_1.pdfIn PDF document text
    • http://miiliioner.xyz/26822032368bc5hj.pdfIn PDF document text
    • http://lamovingcompany.com/cardinal_newman_school_brighton_uniform85huy.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/WENieiS/1454414078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426085/normal_5ff3fec390e77.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/o8jfjf7/28366176065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_6028ea159bd65.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilogifuxe/jtLhihq/idle_dino_tycoon_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_6013e8cb400c5.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/lukafiljtkxi.pdfIn PDF document text
    • http://covidcapsule.world/163100884750iu5r.pdfIn PDF document text
    • http://superheatbelt.xyz/legojipijituierpn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezevenakos.myartsonline.com/oedipus_rex_movie_2008_trailer.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/the_golden_song_season_3_ep_4.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_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 5272 bytes
SHA-256: a9cad7939abb2eee32fedc4acd9f985322a11d5cd0323bac3c2d330e072874f4
font_01_sfnt_off0000f981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF981 10412 bytes
SHA-256: 4893f43961519e6ed07b472fe6a4aa8bb70d06cb0ac4bf0104647d873284c262