Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f1b0c91971fada…

MALICIOUS

PDF

69.9 KB Created: 2021-03-03 10:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f5e357999b8a2d7c86a73f60cd35848e SHA-1: 134581bc73798fcffbcf03ce7fbf3a3430ebbc44 SHA-256: 54f1b0c91971fada1603a82501535d3cd558a3ea47f0c61a10b5a9d086f3e278
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=el+retorno+de+los+brujos+comprar PDF link annotation
    • https://selilanabos.weebly.com/uploads/1/3/4/8/134875664/2951566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463808/normal_6027cde52a772.pdfIn PDF document text
    • https://binewetakug.weebly.com/uploads/1/3/5/3/135326509/ziserabikexere-vuzojujuro.pdfIn PDF document text
    • http://hotita.space/selomolalow2a1yb.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/mujinobulumedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476782/normal_5ffbcda1df31d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_601aec41a7774.pdfIn PDF document text
    • https://nabebumiz.weebly.com/uploads/1/3/1/4/131452902/b8071749428569.pdfIn PDF document text
    • https://ludamezowi.weebly.com/uploads/1/3/4/1/134131800/nupagodemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490736/normal_5fe57f5caa67b.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/tokatefozude/frigates_fiji_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/4915945150.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/alaipayuthey_snehithane_violin_bgm.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_off0000d2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F0 5392 bytes
SHA-256: 5bbcb18d8276a0a21bb3f032b27c97e851b3984a5b00a4f8554500fadad21fa7
font_01_sfnt_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 11820 bytes
SHA-256: 32ca4e6fc30537c6e1d01b026d6bdbaad48f7425a85991f5a59503c3bd7f782b