Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8c495f8b73499a…

MALICIOUS

PDF

77.0 KB Created: 2021-02-11 15:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a428e826704b71d5d6de073f7f4e5714 SHA-1: f8d115d787613a5fe7ceccba3a5020fa8e8a4781 SHA-256: 3f8c495f8b73499a9c8fe8e72c85d59133e67462fd545d32688415f4f92fa492
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://bologen.ru/123?utm_term=wai+wai+house+cranston+rhode+island PDF link annotation
    • https://cdn.sqhk.co/vidujubotaf/wYdje8f/alan_walker_faded_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/cwYBKX6/redirob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_600f867154a92.pdfIn PDF document text
    • http://mimawusavap.iblogger.org/change_button_to_loading_android.pdfIn PDF document text
    • http://vuxuvex.iblogger.org/choji_akimichi_butterfly_form.pdfIn PDF document text
    • https://cdn.sqhk.co/senosekagoko/dWjeQ65/how_do_you_update_software_on_lg_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/dr9WhhL/csr_racing_2_hack_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/hiajcGb/16695666895.pdfIn PDF document text
    • http://vejefulolite.22web.org/acta_constitutiva_de_sindicato_mexico.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/cLi4MDy/34481321013.pdfIn PDF document text
    • https://cdn.sqhk.co/satumunesar/gejggfY/jozejupi.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/yZjeeDp/sms_tamil_movie_ringtones_download.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/polojuliragam/10139453792.pdfIn PDF document text
    • http://zarenubopopo.epizy.com/common_english_words_with_marathi_meaning.pdfIn PDF document text
    • http://vapoborino.rf.gd/all_commands_in_unix.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_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 5132 bytes
SHA-256: aaf009660be22e1b068bc56a4d1b71b2836bcb57cf7e31822c87e67a264020bd
font_01_sfnt_off00010239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 11056 bytes
SHA-256: 303b7bf678af1f80c8554e74f80f3c4a482c911cecfede88462f72c4ac5d9c54