Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54c45691a1d7dc5…

MALICIOUS

PDF

70.7 KB Created: 2021-02-18 17:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4db00208328d0b53d1260c9b7ab6141d SHA-1: 32fab825bc2c4b487785e8d8a47fdfcd6bc758e4 SHA-256: b54c45691a1d7dc53016c86fd5f0467dc9feefa00f9deac5d52a3c117d379cf8
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=are%20old%20nissan%20frontiers%20reliable In PDF document text
    • http://edaruzal.xyz/2181341119j9zdx.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwejujorod/jlhf6jd/mini_me_games_production.pdfIn PDF document text
    • http://instas.site/fazipevikolaguja4c0hb.pdfIn PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/suvusekufag-razekedegami.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/fX6ianr/82747610782.pdfIn PDF document text
    • http://itnegozio.info/bogan_video_songs_kuttyweb9lgx1.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/fomex-zozonebitalus.pdfIn PDF document text
    • https://kesobimagebow.weebly.com/uploads/1/3/5/9/135978915/893211.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/ghLhab7/robzone_douro_x_control_profi.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/DgcNqYY/joker_ringtone_download_mp3_zedge.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/hhUidhe/traffic_road_signs.pdfIn PDF document text
    • https://dipalowijoje.weebly.com/uploads/1/3/0/9/130969855/c0691accc60eac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_6024662750877.pdfIn PDF document text
    • http://probmake12.xyz/67268929498a98sb.pdfIn PDF document text
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/9888773.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 5028 bytes
SHA-256: 48aa90af1880f51513ed4fe9ffe445deb82bb76e95be2cf768b5cc92ad92e12e
font_01_sfnt_off0000e9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 10684 bytes
SHA-256: 3a2d9be7121a54203e3298dbaac068a6c7244416c62bdeeee4fe9b4257ee41c5