Malicious PDF — malware analysis report

Static analysis result for SHA-256 7417d0b0003d7234…

MALICIOUS

PDF

76.8 KB Created: 2021-03-05 01:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f4559d1ae169b622d2dbb8d3a0559112 SHA-1: a9adf70ae2f0211f9be8ac4e2b21bcc60017092c SHA-256: 7417d0b0003d7234d2b5bfe58aa64e4afe6bd303e33ce63a9a7958245486b05e
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 0.9995

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://botokaw.ru/strik?utm_term=888+poker+live+tournaments+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450519/normal_6024768eab50e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_6026e029e48a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489586/normal_5fe14e3b9b70b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_603fb5bd8a8b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_6018895f88b12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475715/normal_5fccae65d2077.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/fekoluziworuxefodataganid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_5fe9aef6814fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505358/normal_6014e50c88eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_6025193dc007b.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/pojab.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/bisute/webozizugujamosuwoja.pdfIn PDF document text
    • http://kobizesamow.rf.gd/medio_ambiente_definicion.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_9839d7118469465fa8a429b91042ea3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pujirageg/pastor_ordination_certificate_template.pdfIn PDF document text
    • http://bivapimoxulo.epizy.com/citizen_wr200_watch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/90312345025.pdfIn PDF document text
    • http://womawujun.atwebpages.com/mimuwudobixumenuxapexaw.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/xofifupibo.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/nazobunefetizatusifavigo.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/black_and_decker_weed_eater_electric_parts.pdfIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_2a6fd496ec984dc6b53133e984e95ece.pdf?index=trueIn 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_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 5464 bytes
SHA-256: f44943d2e4eba409930eb2262825c9aa2cd7da85861c8b47f662990e6c08c012
font_01_sfnt_off0000ff20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF20 11424 bytes
SHA-256: 166a9588ffde1c833ccc994c3e31185b9635651299a8238b900cb6019f635dd2

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