Malicious PDF — malware analysis report

Static analysis result for SHA-256 395740c44631a902…

MALICIOUS

PDF

69.8 KB Created: 2021-02-13 05:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e63ca9b4a4927f9c8622e82c449fe8e4 SHA-1: cd5ebe16de43b114a7a2d71efdaf7438d2a37e02 SHA-256: 395740c44631a902e06e917177937a768c09ec32d6acd8f9aa2e0d7ea6cb9aae
192 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wb?keyword=whatsapp%20stickers%20app%20android In PDF document text
    • https://cdn.sqhk.co/zifeduwa/ggiiCFp/xilovo.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/aGDhbha/fuwobigibizokumeke.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/jbAkb4O/51325269166.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/fDthgjh/31268791003.pdfIn PDF document text
    • http://gidomepijamasos.iblogger.org/arbeitsbescheinigung_muster_kostenlos.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/fniihbM/best_movies_2020_released_bollywood.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/ijieCij/zombie_office_worker_costume.pdfIn PDF document text
    • http://tizigigukaj.22web.org/college_level_algebra_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widofafane/59851178272.pdfIn PDF document text
    • http://bimivopi.epizy.com/self_guided_walking_tour_paris_map.pdfIn PDF document text
    • http://valamujunitun.epizy.com/acer_aspire_7250_wifi_driver.pdfIn PDF document text
    • http://vubixegigag.rf.gd/24515435529.pdfIn PDF document text
    • http://zuwewabarabin.epizy.com/480470891.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/american_airlines_entertainment_app_for_android.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/fishing_report_alcova_reservoir_wyoming.pdfIn PDF document text
    • http://zuvetimimu.rf.gd/burda_sewing_patterns_free.pdfIn PDF document text
    • http://garuwefusu.epizy.com/vce_player_full_version_free.pdfIn PDF document text
    • http://dusozizogotudim.epizy.com/21159644020.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_off0000d5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A0 5208 bytes
SHA-256: 63124ccf21f590f7e7e877460fa0d64882aca85ceb2761faf0497c9b80cdf478
font_01_sfnt_off0000e75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 10172 bytes
SHA-256: 99e8d28159da8a71a4f5166918fb3dc7ecd51f4f76abdc5b91ce536df7c9aa9e