Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d28a4a39c3b7916…

MALICIOUS

PDF

73.9 KB Created: 2021-02-10 21:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4727be4a8f6e81383b530eb1a9979113 SHA-1: b3c1a725c5565435ee625589431a0e7be55cec6d SHA-256: 6d28a4a39c3b7916fcac77bb72dd9fcf5fcfe70fbea11fc60c742d35493fc836
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://jacksth.ru/aws?utm_term=100+cotton+single+bed+sheet+sets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484807/normal_5fd7708e348e1.pdfIn PDF document text
    • http://menbp.online/35321967046f6qhc.pdfIn PDF document text
    • http://silver35.ru/arlington_national_cemetery_visitors_guide1uz5k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fc735f8c49cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5fde91f118e19.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/ghpgfNl/my_baby_girl_is_growing_up_so_fast.pdfIn PDF document text
    • http://kismyketio.com/arbily_tws-_t8_user_manualbysc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fcdf5b7e02a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5fe0f3117900d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5fc61e42a3de3.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/bjhggih/microsoft_365_admin_portal_login.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fec06967d137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fusizizugunu.epizy.com/motor_vehicle_bill_of_sale.pdfIn PDF document text
    • http://sikofus.epizy.com/avengers_endgame_trailer_2_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/consumer_reports_cars_safety_ratings.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_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 5136 bytes
SHA-256: d13e9cd032b92f0ee86b871bf0f46996c64a447b813e387c902cc085b8fa3d9a
font_01_sfnt_off0000f52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52D 11140 bytes
SHA-256: 75fcfd0329fb7bbd1e9da9132e4803646ba14fe3ce684cea70ec726bd3123a0a