Malicious PDF — malware analysis report

Static analysis result for SHA-256 292b6dc1b0cefe3a…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 15:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a47b553e3b0b8b84dab5329302df0443 SHA-1: f794ec701a15a5d4e67ef9cd5da5b7220cb6e48b SHA-256: 292b6dc1b0cefe3a2279e3155a4e97571380280528a12b15a84934aec7117a65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one heuristic specifically identifying a 'mass external PDF link farm'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for further exploitation.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/123?utm_term=bissell+cleanview+lift+off+user+guide PDF link annotation
    • http://cosmeteca.com/cfa_level_1_study_guide_free_downloadbpyqh.pdfIn PDF document text
    • http://hotita.fun/54733100285z8fut.pdfIn PDF document text
    • http://gratoraama.website/hollow_man_2000_full_movie_hindi_downloadj06n2.pdfIn PDF document text
    • http://metalllift.ru/nurejese8gnz.pdfIn PDF document text
    • http://jilet1.club/xolemububuio06r.pdfIn PDF document text
    • https://zutuvibob.weebly.com/uploads/1/3/1/4/131407898/587b3328.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/scholarship_result_2019_answer_keyvavv5.pdfIn PDF document text
    • http://chategratis.online/starbucks_brand_identity_guidelines47fza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://benebobuku.epizy.com/fixing_coliform_bacteria_in_well_water.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/auto_repair_manuals_mercedes_benz.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/takalekafafeja.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/skf_chevin_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/egyptian_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/31298943444.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/bharat_all_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/titanic_music_sheet_piano_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/email_formal_en_ingles_b2_ejemplos.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_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 5392 bytes
SHA-256: b613faae1f4422e2b7a7a43847864ed6004d48fa71f4f319c8bd558c85745c78
font_01_sfnt_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 10832 bytes
SHA-256: ec5c6a46ae64b14959cfba84c1bb8008bf67a0d96b4bcca7e7991de7581a4ff4

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