Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09bb215c44b1a9c…

MALICIOUS

PDF

86.2 KB Created: 2021-02-23 02:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ff64ed332f73d56d6f60bff83fa2c61f SHA-1: b0dcc5723ea1f154ab1d5c1166089eb4cbe4718d SHA-256: d09bb215c44b1a9c5a31d75f6dc90f21e2136a814c7c7a1e513f4216b41ac77b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links pointing to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection. The ML classifier also strongly flagged this file as malicious. The primary IOC is the redirector URL, which is likely used to serve a secondary payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/strik?utm_term=safety+first+car+seat+compatible+graco+stroller In PDF document text
    • http://naturfresh.fun/minnesota_crappie_fishing_reportlizdk.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/iYiggeK/nasp_archery_tournaments_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/xTOnjfm/53457123363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384039/normal_601783356ad30.pdfIn PDF document text
    • https://cdn.sqhk.co/powurejur/vWiijaZ/talking_ginger_2_hack_apk_download.pdfIn PDF document text
    • http://nizuvifoko.iblogger.org/awadhesh_premi_video_gana_dj.pdfIn PDF document text
    • http://ramuwazezu.22web.org/5_day_workout_routine_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/gjzjeie/nba_g_league_ignite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425929/normal_5ff7b1037cd2f.pdfIn PDF document text
    • http://ovca.space/how_do_you_feel_when_reading_a_bookvxyif.pdfIn PDF document text
    • http://drnextact.xyz/68579555012qqozh.pdfIn PDF document text
    • http://scriptbook.xyz/gw2_leatherworking_guide_400-_500lhs8n.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/mokuwanibof/games_for_pc_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/acetyl_coa_formation_from_pyruvate.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/vosemi.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/afpsat_e-_portal_online_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/activex_plugin_for_internet_explorer_11.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/le_petit_nicolas_summary_chapter_8.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_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 5680 bytes
SHA-256: ba5e8a3239662b331dafb879cd6f0defcd31a8f94bc27b3dda7628803ccad146
font_01_sfnt_off00012640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12640 10812 bytes
SHA-256: 317492a53b0ce53e373c56a70651f3e25278f066e9f4778a658ec105cbc3419c

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