Malicious PDF — malware analysis report

Static analysis result for SHA-256 c308bf864dcf65d9…

MALICIOUS

PDF

65.6 KB Created: 2021-02-25 04:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f4b38eb0305c7471792ae30ff2e005e1 SHA-1: ad47169baeb8ad3eee47a6ffc64c6c97c7e79ed4 SHA-256: c308bf864dcf65d9705fb3b8e509fbfbce71aa36582eaba68e6afa671d40b6ce
126 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/award?keyword=solar+energy+questions+to+ask PDF link annotation
    • http://metinozub.iblogger.org/scipad_book_2_answers_chemistry.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/gegjvqB/33064752632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_60242fee852e1.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/90218302085.pdfIn PDF document text
    • https://cdn.sqhk.co/buzivafulet/eDujb7S/bomber_friends_ios_hack.pdfIn PDF document text
    • http://vumagiwupesaka.22web.org/top_bollywood_songs_2018_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_601fb139004ab.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/qig7Oja/xedoripebumedujugunadi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vefazuxugog.rf.gd/69402010712.pdfIn PDF document text
    • http://wepaxilex.epizy.com/74913251466.pdfIn PDF document text
    • http://minegavanifur.rf.gd/tabel_nutrisi_hidroponik.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/are_you_supposed_to_wash_off_sheet_mask.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/96292859288.pdfIn PDF document text
    • http://sapofikij.epizy.com/appraising_employee_performance.pdfIn PDF document text
    • http://xelidev.rf.gd/vonutaruga.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_off0000c5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CC 5248 bytes
SHA-256: 4114c0259ce172b58f70fa00e30c2a17d78afb327d2d317d6c6b757049068a67
font_01_sfnt_off0000d7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B9 9780 bytes
SHA-256: 121f21bdade8e2a2472b34eed39f581ec1090d94e5f0fd8f4449b062d55e8551