Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3abc8e8d6394f7a…

MALICIOUS

PDF

73.2 KB Created: 2021-02-24 17:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cb00331a21b18bc8e2e6bc44e322f137 SHA-1: f36feced2d36e541b86ef5a882698ac22488fac9 SHA-256: b3abc8e8d6394f7a16d475719d2819fd3a2691d9d7198f4667ceab4f1e0d6371
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://yafferge.ru/award?keyword=romeo+and+juliet+act+3+scene+2+line+47+allusion In PDF document text
    • http://bilkan.fun/243030749638fqk5.pdfIn PDF document text
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/79f8b3.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/gdeU0ih/youtube_animated_stories_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/fuLCcjf/dino_racer_game.pdfIn PDF document text
    • https://fubapisa.weebly.com/uploads/1/3/1/4/131406294/4147457.pdfIn PDF document text
    • http://nukels.xyz/gimosorovavovezusaq0eq.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/hjhgg0k/pico_de_gallo_burger_from_whataburger.pdfIn PDF document text
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/gomevijigafu-winibanulufokax.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/nuwogil.pdfIn PDF document text
    • https://cdn.sqhk.co/guzelatolina/gdjBm0I/charades_words_hard.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/59b704f.pdfIn PDF document text
    • http://natnat.fun/6898583407e51zg.pdfIn PDF document text
    • http://egosikenclub.com/semi-_pro_dslr_cameras_rankingypsbd.pdfIn PDF document text
    • http://penageli.getenjoyment.net/metamorphoses_book_14_sparknotes.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/hjMhbge/wububaluwerefuzawat.pdfIn PDF document text
    • https://povisegidugukab.weebly.com/uploads/1/3/1/8/131871963/3002215.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/rinnai_infinity_20_installation_price.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_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 5536 bytes
SHA-256: 7c935b62ef621bf5ca4e6915cc9ec48ba70d01b5e173c558f70e7115a3e8c02e
font_01_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 9988 bytes
SHA-256: ca096e599c568d3e55221a512fa923a0d17fb7f1ce4b87289b33589df6647fca

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