Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf1a721275e49b0…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 20:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 29b83049903889d73168c9362318e43a SHA-1: 4a42a9061949f19f984b96d26e2da0af2d70762c SHA-256: cdf1a721275e49b02df5c3e9ec3b5e9970c4199bdd5f2cf18ca706d5dffa4cbe
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://yafferge.ru/wb?keyword=how%20to%20deal%20with%20autism%20students In PDF document text
    • http://metalllift.ru/ssr_125_performance_cdimk0bo.pdfIn PDF document text
    • http://axecheat1.xyz/el_poder_de_la_palabra_hablada_florence_scovel_shinn21y6q.pdfIn PDF document text
    • http://oneitshop.pro/selfless_imdb_parents_guidegfrlj.pdfIn PDF document text
    • https://muluxadi.weebly.com/uploads/1/3/1/4/131453645/4012026.pdfIn PDF document text
    • http://smotrikino.fun/2334720224a7c1j.pdfIn PDF document text
    • http://artelamp.store/cetusplay_tv_remote_apkk2ir2.pdfIn PDF document text
    • http://ultra0.space/gozivegqc2g.pdfIn PDF document text
    • http://renakuw.iblogger.org/breville_the_smart_oven_convection_toaster_oven_reviews.pdfIn PDF document text
    • http://cuzinfo.ru/13572288215iwg5q.pdfIn PDF document text
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/718ff92346540ba.pdfIn PDF document text
    • http://optarfes.com/sanai_choughade_video_songsnm9nl.pdfIn PDF document text
    • https://nufujemirifo.weebly.com/uploads/1/3/4/8/134868255/9dbd3e.pdfIn PDF document text
    • http://moluroniv.22web.org/colbert_report_best_moments.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memokikadu.rf.gd/finding_angles_using_trig_ratios_worksheet.pdfIn PDF document text
    • http://baxudoxubalafe.epizy.com/konarusekamizalipe.pdfIn PDF document text
    • http://dujabonesisu.rf.gd/char_dham_movie_hd.pdfIn PDF document text
    • http://wobemiko.epizy.com/play_store_pending_wifi.pdfIn PDF document text
    • http://jezawijevot.rf.gd/xixukibujutelojenasiros.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_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 5020 bytes
SHA-256: d856a8591ad423e8a0ecdd4ed32231bb94989ed9939331714c82da10dcaf4bb8
font_01_sfnt_off0000f309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 10488 bytes
SHA-256: f41125af06bc1618b96a72e4a80509eddafa7438587af8ca7088ff4a20389ea6