Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13c44021b455d74…

MALICIOUS

PDF

62.3 KB Created: 2021-02-12 07:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 68b93d20d56e90a08e4e4dabd8cb116b SHA-1: 2cc6225bd5514292c1ac07524e484f5d4aa9c526 SHA-256: b13c44021b455d7436e949c733bb9a2e98e05d772d332ef0a5097ee808d31edb
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=math+perplexors+level+c+answers PDF link annotation
    • http://3gusevshop.space/15505576206jzdoy.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/sigolawej_wumazu_xalebujoz_segitokigide.pdfIn PDF document text
    • http://goproits.com/75388640653iaecc.pdfIn PDF document text
    • https://murafasonuralab.weebly.com/uploads/1/3/5/3/135398902/85aba22cbc433d3.pdfIn PDF document text
    • https://nexirexosevexos.weebly.com/uploads/1/3/4/5/134500935/nunizik_pujagajamok_dasowe.pdfIn PDF document text
    • http://slmit.fun/iphone_6s_matrix_live_wallpaper_videos2tbk.pdfIn PDF document text
    • http://eduha.online/16292021516ujjyc.pdfIn PDF document text
    • http://mrshadow.net/algebraic_structures_lecture_notesc0mfw.pdfIn PDF document text
    • http://svoylend.xyz/domofisupigavabolakewilijye8ax.pdfIn PDF document text
    • http://disclosures.space/up_board_class_12_marksheet_201963zo3.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/fosawef/huawei_update_android_9._0.pdfIn PDF document text
    • http://zunebodiz.epizy.com/central_budget_2018-_19_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/edgerouter_x_setup_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/book_design_templates_promo_code.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_off0000b9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B6 5248 bytes
SHA-256: 49a8eaf502928931183ffe30ea1bfa1a484c3130117e1aaa9831c2a2ee829a16
font_01_sfnt_off0000cba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA6 9672 bytes
SHA-256: e1bf5de96c30df24703df13ac7f72c78235b5a2063a284f5c8411b0b7b3789ed