Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5824957de068e2…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 23:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30cd132452bb7ac15b0e1ab405448eb9 SHA-1: 9d0abf042244356bb8963ec58380740b9d9275a5 SHA-256: 5c5824957de068e208bd8c6ac2b8cea33f13effe04e8eba918ca1a04373afcda
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://vilenefex.ru/strik?utm_term=battle+angel+alita+anime+streaming+ita PDF link annotation
    • https://cdn.sqhk.co/mosugukasiba/uiefdjb/20659051787.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/hhhGjgk/nupol.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/ggXTx1Z/switch_pros_mount_tray.pdfIn PDF document text
    • https://cdn.sqhk.co/wowobavukelo/b66hjO3/parkour_flight_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/1jhogdD/nuselonutekijusorawutux.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/DxjbjX0/stickers_de_youtubers_para_whatsapp_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/lfhegfl/espn_events_today.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/8935720.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/jahjRgc/26133812973.pdfIn PDF document text
    • https://cdn.sqhk.co/kebabefepu/jELshjz/57313478831.pdfIn PDF document text
    • https://cdn.sqhk.co/zovifesojeme/ifgdi0W/fosixezovuxawojobikajoz.pdfIn PDF document text
    • https://fetibafavi.weebly.com/uploads/1/3/0/7/130776688/5000495.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/1dheuhf/the_farmer_s_dog_pet_food_reviews.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/1f7a5fbc.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/Bj3hcii/stickman_rope_hero_unblocked_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/GjfL6gj/diary_with_lock_and_key_for_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/cmyk075/61708430018.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/1883921.pdfIn PDF document text
    • https://pokotozumunas.weebly.com/uploads/1/3/1/4/131453498/nefige.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_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 5056 bytes
SHA-256: f3f89e056380a9c3da3631c42f94a5f62e025f1dc81c9371dd25733c52e928c9
font_01_sfnt_off0000f0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B7 10984 bytes
SHA-256: 13b9072c5fccf9060758ff6933b08c9999789232c1aabe6337b93d17d45af635

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