Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33dad9d5a4eec50…

MALICIOUS

PDF

80.6 KB Created: 2021-06-11 04:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 709ca865402225726fd11dc5feafd66b SHA-1: 98af8c0741d92912aa4e2126362666be90c5b3ed SHA-256: e33dad9d5a4eec50844194bd2301fc27f6f5d39d541f2784301847dbe8932add
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9996

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/123?utm_term=comment+faire+une+bibliographie+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464297/normal_601a466d84f3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5fcbb886a4578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_5febb4c980b0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416935/normal_5fdf9ba0907a4.pdfIn PDF document text
    • https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/vuwezuzujaxepikekal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_600e67951525b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_5fd91be131dde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_60c0ef63cd0a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497093/normal_6020c24784522.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403557/normal_5feedaed33224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_60494641225e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_605f7abaa5b78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410678/normal_6005079bbf027.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421213/normal_5fef597cb4067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_60b870de6f996.pdfIn PDF document text
    • https://doxezasofe.weebly.com/uploads/1/3/6/0/136088479/kadutimekurinepi.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/a3f7621802.pdfIn PDF document text
    • https://medumoxil.weebly.com/uploads/1/3/1/0/131070238/1a5d284.pdfIn PDF document text
    • https://sigipobixa.weebly.com/uploads/1/3/1/6/131606309/191d0aac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mikabipi.pbworks.com/f/3564824969.pdfIn PDF document text
    • http://simaduwu.pbworks.com/f/bailey_bridge_design_manual.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_off0000fa41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA41 5320 bytes
SHA-256: 97be2dab5d997c4ec9c634f1c3ed7cc98661bb52ad6324f85eb3857dfe84029e
font_01_sfnt_off00010c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C23 11996 bytes
SHA-256: b8c483388926ac758689eb64d471ed42015844e32b6e42b21e421d8d5a16ae11

Open this report in the interactive analyzer, or submit your own file for analysis.