Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a41b27fbe82b757…

MALICIOUS

PDF

72.9 KB Created: 2021-01-25 04:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d5562cb0b64a4db1da6c94111de2ac1a SHA-1: fbfb95d073fbec4d6ed3624073cf8c707babd4c4 SHA-256: 4a41b27fbe82b75772f173e6995450a562d6b3c06ce743c464d17c35ef7acf6c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/wb?keyword=talk%20with%20g%D0%B3%D0%B0nn%D1%83%D1%82 In PDF document text
    • https://cdn.sqhk.co/dejijadu/giajfhd/total_number_of_biology_chapters_for_neet.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/5ZMmMM6/gangster_songs_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/bjgihgh/chicken_invaders_5_download_android.pdfIn PDF document text
    • http://tranquils.space/lugipifapufoxudefatigi6bgxd.pdfIn PDF document text
    • http://hurleyshamburgers.com/guess_the_running_man_koreax3wsl.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/iIgdjda/50800108593.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/jiGwLa5/gepob.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jg9yRih/bomber_arena_bombs_with_friends_unlimited.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/iQjjHje/setup_free_netflix_t_mobile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaligapuk.epizy.com/binomische_formel_bungen_mit_lsungen.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/aortic_stenosis_guidelines_echo.pdfIn PDF document text
    • http://vatilibudavelit.rf.gd/android_nougat_burp_certificate.pdfIn PDF document text
    • http://jexiduro.rf.gd/monthly_management_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/alto_shaam_ctp7-_20g_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/inderal_dose_for_performance_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/vogoduliwutokimivu.pdfIn PDF document text
    • http://vosivoru.epizy.com/18244030641.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/fatinenaxulu.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_off0000df26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF26 5176 bytes
SHA-256: bfa01a42021bb3271fb7fcc2fff5c9d4f2284100850ee5a23021008cf1e056f6
font_01_sfnt_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 10976 bytes
SHA-256: 7194bd2eb05265a491dce8c64d76c536647f8172f9a4fbd07341a2b827190b5c