Malicious PDF — malware analysis report

Static analysis result for SHA-256 5febb0d5f9ef602c…

MALICIOUS

PDF

75.0 KB Created: 2020-11-10 10:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0062abee0a95b60a33df8eff0e9d3124 SHA-1: 2ee8f28ffdafa0e45bb254a97fee33f1463699fe SHA-256: 5febb0d5f9ef602c1443085e1b924dfb71a7fc742daacb91721ceea4b76e58c1
156 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 0.9997

Heuristics 5

  • 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.
  • 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://trafffe.ru/123?keyword=ha+gay+meme+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391649/normal_5f998fd459996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_5fa06f0a4c479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5f9cfd639089d.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/nodiponibozu.pdfIn PDF document text
    • https://lolipakefupixo.weebly.com/uploads/1/3/4/6/134614949/969551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5f99c76d99cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5f9a79996c077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa020d8-c8ce-4418-8fee-99e3c60c2b1a/60685286740.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/troy_bilt_tuffy_tiller_model_183631.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/dironopiluxomivewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7a8939-f6fa-4ec1-b889-d67e1b73c53c/miamisburg_high_school_marching_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec1d35f-0e8a-432b-9556-dd5a18f379a5/xevutatiboxev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c6744f-89b5-4a77-8081-6a5793b9e8c1/xevizovutumitil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D2 11940 bytes
SHA-256: e92d1ee4bc6fa01e93089ea6fe15b6241b108e0b1b7ff3932e3a61e1d8457a6a
font_01_sfnt_off0000eb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 4940 bytes
SHA-256: 4d224ff3248c172d2d328e3bdf457fd004cc7dd54d8a9429d4e26701d6d9db78
font_02_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 10460 bytes
SHA-256: e020fe6044f43131ee057131e6a8c1a681a66c10aa77b6a742dbcbb3dbed1515

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