Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f94c50ec2a506d…

MALICIOUS

PDF

72.4 KB Created: 2021-02-10 04:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2fac2d1d4a8e6f6fce84e6c4ee24a148 SHA-1: 24a15842e7047e800d54ec16c9ea08e5f8417ce3 SHA-256: 42f94c50ec2a506d541f8163973f5b18632d4f5393317d10417007328c97786e
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wb?keyword=what%20is%20chicago%20manual%20of%20style%20citation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369509/normal_5ff36283ae6cb.pdfIn PDF document text
    • http://replyua.site/499799467547oey0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482671/normal_5feceda110d27.pdfIn PDF document text
    • https://cdn.sqhk.co/denugesugumu/YPqETzH/66962231529.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489587/normal_5fdd0b1f4e357.pdfIn PDF document text
    • http://sellforce.ru/kyoto_autumn_colour_reportucb23.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/CzZLhcG/lexia_reading_core5_login_online.pdfIn PDF document text
    • http://safagiko.iblogger.org/incident_report_sample_workplace.pdfIn PDF document text
    • http://pobijubak.iblogger.org/64365542985.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/gdjgNhj/choppa_meaning_in_malayalam.pdfIn PDF document text
    • http://tublitalia.space/chocolate_cake_recipe_from_scratch_without_buttermilkpx89n.pdfIn PDF document text
    • http://instapriz24.online/vozeguwinifitukumitagmck41.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jgxmiiZ/jekujeguvijij.pdfIn PDF document text
    • http://bigswinner.space/how_to_stopwords_in_nltknv8z9.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/IJqYijj/zombie_2_movie_full_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489725/normal_5fd2fa604de72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://munoxefarofow.rf.gd/free_fileminimizer_pictures_full_version.pdfIn PDF document text
    • http://vomotoboxavixot.epizy.com/84961763783.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_off0000de77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE77 5312 bytes
SHA-256: 6dcfacb70849f1de831948d1a8051b5a672be8491aad976cdc992a8ccc44156a
font_01_sfnt_off0000f080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF080 10540 bytes
SHA-256: 6e571892da86c51744789d5a22da6d200255add82e7cdcf170b9720105cf1b6b