Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcc40328ae7f28e…

MALICIOUS

PDF

66.5 KB Created: 2021-01-20 16:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8e14c17ca546edeb84a8556192b1a234 SHA-1: 842488e26a1f7a8d5925b18887097ad2bf295f0e SHA-256: bdcc40328ae7f28e0730291ec09b66c4a407f211d0423f09ed84b690d5286da6
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://crophysi.ru/aws?utm_term=agathiyar+songs+video In PDF document text
    • http://nufapivevavenak.22web.org/62235779434.pdfIn PDF document text
    • https://site-1168287.mozfiles.com/files/1168287/paracetamol_overdose_guidelines_rcem.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/Bgj2he6/pibagejivezobezomasake.pdfIn PDF document text
    • https://site-1168027.mozfiles.com/files/1168027/tartarin_de_tarascon_livre.pdfIn PDF document text
    • https://site-1176860.mozfiles.com/files/1176860/37091479354.pdfIn PDF document text
    • https://site-1175991.mozfiles.com/files/1175991/zoropuwesukonajipuwamikep.pdfIn PDF document text
    • https://site-1174029.mozfiles.com/files/1174029/4556213356.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/bjdQgNL/58475635655.pdfIn PDF document text
    • https://site-1176450.mozfiles.com/files/1176450/whale_shark_addon.pdfIn PDF document text
    • https://site-1171827.mozfiles.com/files/1171827/gopimezumajedegofob.pdfIn PDF document text
    • https://site-1177739.mozfiles.com/files/1177739/foninajesorakideloxosixit.pdfIn PDF document text
    • https://site-1171112.mozfiles.com/files/1171112/voice_lessons_iphone_app.pdfIn PDF document text
    • https://site-1176846.mozfiles.com/files/1176846/rasutagaralil.pdfIn PDF document text
    • https://site-1177444.mozfiles.com/files/1177444/auto_clicker_for_roblox_android.pdfIn PDF document text
    • https://site-1179856.mozfiles.com/files/1179856/imaginary_and_complex_numbers_worksheet_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zusewijoje.epizy.com/jumble_chicago_tribune_answers.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/control_chart_template_excel_2013.pdfIn PDF document text
    • http://rigitusavogu.epizy.com/how_do_i_capture_screenshot_on_android.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_off0000c78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78D 5208 bytes
SHA-256: 12baa8f7a9bed760d945a1945c970c9acbe4258859ae18648c89793ad6ca0f28
font_01_sfnt_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 10528 bytes
SHA-256: f6d63a7f45b2eee0ba65e79907bc10282f78fd708da91e2b81d88cec0e59cbd9