Malicious PDF — malware analysis report

Static analysis result for SHA-256 3948e01e479674e9…

MALICIOUS

PDF

72.4 KB Created: 2021-02-23 00:37:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 655bbad87ef9adfb852349fc5b81144c SHA-1: 2919e50a695a4e55ce1dad58ce1d0157addfbcad SHA-256: 3948e01e479674e9e0fedb4a8af30d03e8fdf1e18aa2b4c5ed8093f72924eb06
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://jacksth.ru/wb?keyword=how%20should%20a%20greenhouse%20be%20oriented PDF link annotation
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/zekikesijuxegip.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/momomas.pdfIn PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/db34ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_5fdb408e6dc05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_60158a0be5dfb.pdfIn PDF document text
    • https://vizijupazikek.weebly.com/uploads/1/3/2/8/132814338/lopexifokezevup_vofezew_tosadugafuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366662/normal_60035ecc37ef4.pdfIn PDF document text
    • https://runanusug.weebly.com/uploads/1/3/5/3/135313332/7144165.pdfIn PDF document text
    • https://vigedinolig.weebly.com/uploads/1/3/1/3/131380992/407638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_60342e8011830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494440/normal_6027a6c9f2a75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488558/normal_6011ae954f074.pdfIn PDF document text
    • https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/c240a44c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_600c789c6c014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464315/normal_5ff7cf9ab62f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485153/normal_5fef9cc0905c2.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/8be4d7bc.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/372f0bba384.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_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 5280 bytes
SHA-256: c8028607074c6a94cc72c682b79ef57fbe8106c00247ea76759934c2ca081f9f
font_01_sfnt_off0000ef46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 10916 bytes
SHA-256: 3705dc12fd6f6658ba2f4e465c48414d4f18aa56b21c67300ec887dec0a236d0

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