Malicious PDF — malware analysis report

Static analysis result for SHA-256 e428e7b7cdb72482…

MALICIOUS

PDF

67.6 KB Created: 2021-02-27 00:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc43f760270712aca0e2d4705be562a7 SHA-1: c0b583c5e30aa382292a26cd29f13ccc43a723be SHA-256: e428e7b7cdb72482f716c13c147cbe00de17d40c76bc49a50b7a1477f2effe05
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 5

  • 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
  • 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://mezovuduw.ru/aws?utm_term=is+strategic+management+a+science+or+an+art PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422144/normal_5fcddc663c314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413693/normal_6039718e162a1.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/wanepozon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464319/normal_6015841b53051.pdfIn PDF document text
    • https://kegadurab.weebly.com/uploads/1/3/4/0/134096735/piwogowafop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_601fd74e9e034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_603107e52e263.pdfIn PDF document text
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/5303306.pdfIn PDF document text
    • https://vasikeja.weebly.com/uploads/1/3/2/7/132710563/4030f3358809e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_6016d01f60aa2.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/how_to_unmarry_livewire_ts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485308/normal_5fc608b449aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_601f2f6e61d21.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/numimedujoxovad.pdfIn PDF document text
    • https://fudanologakobur.weebly.com/uploads/1/3/5/3/135394175/duwezarobipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_6022836285031.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/78597731448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_60186d5042fc3.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/zifilobesumafi/raleranitu.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 4812 bytes
SHA-256: c83a785446bf0867004a201832b179f1b454a302ba349cc16a99368bfe6a8f6b

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