Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3bdba93f809621…

MALICIOUS

PDF

71.0 KB Created: 2021-02-12 18:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0442b2f40ee6e5c8ed5e027ab3d61431 SHA-1: 1a0b8fa6814f41fc20a2562b51d6d6c0054a41fc SHA-256: 4d3bdba93f809621bb41d7350ef317297365a5ae8205e2e94ced5191ff8fde03
186 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
  • 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.
  • 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://jacksth.ru/wb?keyword=dragon%20age%20origins%20gift%20guide%20mod PDF link annotation
    • https://cdn.sqhk.co/kapapomabu/ic1ijhg/zikilunamibexegete.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/haibhiR/12144121217.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/muvenotasavir.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/f919e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464315/normal_60158f36a238c.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/niturozusaketevuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6014db1451284.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/ymcUib6/danger_safari_dash.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_6015ee2faf663.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/iihhAjh/skin_creator_for_minecraft_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5ff764a0871d5.pdfIn PDF document text
    • http://all-system7.club/performance_review_comments_for_job_knowledgecmwy8.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/moxid.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/pagegafud_moxoses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_60111cd17437c.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/paxunu/61601620636.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/comics_templates_arabic.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/psp_emulator_iphone.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_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 5192 bytes
SHA-256: fec27a17f08135e4ab67b90fde9fcb3d0c7560306b6ffe5584cf105d9ee27374
font_01_sfnt_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 11092 bytes
SHA-256: e7ff9b18aa0ab3ebf02a23a5c8c8e32df98cfd32103e8ae03a2d92fb69f83f60