Malicious PDF — malware analysis report

Static analysis result for SHA-256 d989b004b6dbb1c1…

MALICIOUS

PDF

79.3 KB Created: 2021-02-22 13:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3c44eefd087d5f12889c4f688c605387 SHA-1: 9904bd5f43d9f744b444e28ff5047f684f1d5bd8 SHA-256: d989b004b6dbb1c1a0917ae67eb74b7a7d7b70d832d571e9fde4925d392eb406
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://yafferge.ru/123?utm_term=what+does+stay+woke+means In PDF document text
    • http://dkblogin-de.best/jumizikozadqlng8.pdfIn PDF document text
    • http://fowaxulop.iblogger.org/spelling_worksheets_for_12_year_olds.pdfIn PDF document text
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/6737969.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/3687123450893548.pdfIn PDF document text
    • http://believes.space/50399761688v3ff3.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/jgjiLi8/72407125609.pdfIn PDF document text
    • http://retys.space/wofexepa0xq3t.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/Kifhghe/juwagiporirixefefuva.pdfIn PDF document text
    • https://cdn.sqhk.co/nujorazaje/2vmAij8/traincontroller_8_gold.pdfIn PDF document text
    • https://pifabevab.weebly.com/uploads/1/3/4/7/134721676/3365287.pdfIn PDF document text
    • http://liwitavazij.iblogger.org/64204058150.pdfIn PDF document text
    • http://dagulofevururuk.22web.org/brain_teasers_for_adults_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobejuk.rf.gd/swot_matrix_template_powerpoint.pdfIn PDF document text
    • http://pumatelikowe.epizy.com/punch_drink_pictures_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/counter_strike_source_non_steam_full.pdfIn PDF document text
    • http://fepujusarif.epizy.com/adobe_acrobat_standard_dc_full.pdfIn PDF document text
    • http://nudumen.rf.gd/81381711789.pdfIn PDF document text
    • http://natadomemorad.epizy.com/chemistry_of_boron.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_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 5208 bytes
SHA-256: 8d087dcdc07e874ca0b5c915884b7193ca0ca45bf20df09d5fa7fd8116c2af43
font_01_sfnt_off00010a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 11116 bytes
SHA-256: 4553cde24b48f21163220764c66c696cdc6f1dbb807b8c233e5947e074c09ce2