Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1a4168b98b2534…

MALICIOUS

PDF

73.3 KB Created: 2021-02-21 08:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: edc7816dc7ec29fb6b0e2344741ec037 SHA-1: c5aa246493186115ab5517cc6e5f015c9e6b9b68 SHA-256: 4f1a4168b98b25342796f8d773d9950c948fd1c4e72c75eab3dded7dd5fd14d9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://seumenha.ru/wb?keyword=cual%20es%20el%20musculo%20fuerte%20del%20cuerpo%20humano PDF link annotation
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/zirapi_tekenuwilomagi.pdfIn PDF document text
    • https://rujikanonige.weebly.com/uploads/1/3/1/8/131872107/6ad644ad0f.pdfIn PDF document text
    • http://paksorond.xyz/biology_multiple_choice_questions_with_answersyby2o.pdfIn PDF document text
    • https://jopuwijexanubuf.weebly.com/uploads/1/3/0/8/130874501/zafaremuxo.pdfIn PDF document text
    • https://dukinuvofipul.weebly.com/uploads/1/3/2/7/132711936/6233848.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/3802033.pdfIn PDF document text
    • http://aazzzry.space/legends_of_runeterra_decks_beginnerplfli.pdfIn PDF document text
    • https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/saravowibon.pdfIn PDF document text
    • https://ludugekokokak.weebly.com/uploads/1/3/5/3/135313409/386f78810.pdfIn PDF document text
    • http://raisinshub.club/email_newsletter_templates_mailchimpei0kj.pdfIn PDF document text
    • https://lalojitewimagix.weebly.com/uploads/1/3/5/3/135304200/307768.pdfIn PDF document text
    • https://mudizuponiwox.weebly.com/uploads/1/3/2/7/132740987/8107073.pdfIn PDF document text
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/ac05c.pdfIn PDF document text
    • https://pekavodasusoku.weebly.com/uploads/1/3/5/9/135982803/3489522.pdfIn PDF document text
    • http://viewcreditscore.info/beauty_and_the_beast_2017_free7blg9.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_off0000df49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF49 5300 bytes
SHA-256: 70e947e00237252c1824ce3f6724462fe012e332578a7fcb2ea57c0b6bf13c5c
font_01_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 11588 bytes
SHA-256: 48667fd43874bfe56cdca96e38f1cc10cea1362eafb6e65b60b029f075e212d9