Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c2d5e914ce7136…

MALICIOUS

PDF

76.3 KB Created: 2020-12-27 11:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bd181789f3020cea06812008719bfaf3 SHA-1: 1feecb78d5806d3d550d361a122836826570729c SHA-256: b0c2d5e914ce7136190692ca3edf14515a05d4f15cec249417f98192c3604f1d
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 0.9998

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://trafftec.ru/strik?utm_term=revolut+business+contact+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495838/normal_5faddf4ef2c17.pdfIn PDF document text
    • https://nadoxunerakabem.weebly.com/uploads/1/3/4/3/134378450/3378725.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/7008827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5f8d6ce74c752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fc62039d8b94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5fbd10d09a71d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f8f696b848f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376610/normal_5fc45b4937ce4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474470/normal_5fe331fe46ff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_5f98ceb5cc037.pdfIn PDF document text
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/3533694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480591/normal_5fcef3eb1281d.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/tezude/25846806516.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/80783571140.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/mudazesorujijugisakujuruv.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_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 5152 bytes
SHA-256: b4e35ed1994b25cde78d750edd4e59ac3f32036650e867c883a70b4b5b76d1ab
font_01_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 10924 bytes
SHA-256: 1c4603e597e626300242cad5ba07859ddca78a7a892ec7a76a85edb94ba57fc1

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