Malicious PDF — malware analysis report

Static analysis result for SHA-256 4260805d8f223816…

MALICIOUS

PDF

71.8 KB Created: 2021-02-27 00:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6d25a36839a3264e4728c12f2bdda321 SHA-1: 6b842ca8313116be262a7eaa213669eefb7220ad SHA-256: 4260805d8f2238160466c1f443e2eae29a92bc31385e8f710781e2e689f42a4a
184 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
  • 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://crophysi.ru/award?keyword=3rd+grade+math+coloring+worksheets+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4476758/normal_5ffcca1d725fb.pdfIn PDF document text
    • http://zumubexupon.22web.org/chicken_chaap_recipe_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fe9826b7e183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_603696a0dfcb6.pdfIn PDF document text
    • http://patamekuzon.iblogger.org/hd_tamil_movies_2018_tamilrockers.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/aghPpia/36763812722.pdfIn PDF document text
    • http://sitajejo.22web.org/types_of_influence_tactics.pdfIn PDF document text
    • http://zuwigef.22web.org/budowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_60379146c83f5.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/3iEXeSu/hello_neighbor_2_alpha_1._5_crowbar.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/bicBzGR/find_my_phone_android_without_app.pdfIn PDF document text
    • https://cdn.sqhk.co/wazewiput/eheherW/uber_eats_orders_sign_up.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485927/normal_60388b88d9af7.pdfIn PDF document text
    • https://cdn.sqhk.co/xizemeginu/SejajiZ/4608140128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kisolapuri.rf.gd/ratogusazet.pdfIn PDF document text
    • http://xawatutosewo.epizy.com/gomamegub.pdfIn PDF document text
    • http://vatikob.epizy.com/bunny_cartoon_images.pdfIn PDF document text
    • http://motinekan.epizy.com/vcaa_psychology_examiners_report_2018.pdfIn PDF document text
    • http://budibebolimuxo.rf.gd/29956205028.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_off0000dada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADA 5660 bytes
SHA-256: fdf409f645aeb4292b4a58909c43246237e6acccc657681a696820b18de92b85
font_01_sfnt_off0000ee03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 10464 bytes
SHA-256: 87bd20089941b2d15821653d33bf49e433bdbb2aea8fa5325fbc2a7790f8411c

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