Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d084bb8c18ae7e…

MALICIOUS

PDF

69.4 KB Created: 2020-11-22 04:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dc3b2a13049d8a33800c189e3a9f5f17 SHA-1: d4e445b66d2a9b6c9cfe37415361a27f348ee326 SHA-256: 94d084bb8c18ae7e2d654968f83fd3aaf1dc20ae5a5a7cc34eccfd4fc0ab632c
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://traffking.ru/123?utm_term=force+strike+heroes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411511/normal_5f99cabf3dfd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f881b7a1df3b.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/5233133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5faaa6498343b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489402/normal_5fb305758789b.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/vanojiraxajerubefiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f87407be56f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8ee0ac6392a.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/7151853d-0d5a-444e-a57d-8d01501fb38a/2031805625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341002e8-db93-4d4e-aaf8-c48fb747adc4/podidivefawile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27be06a-115b-4f84-abe6-9af1665074c6/bubep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36a049b-4a50-4231-b362-b5f82fdf6488/algebra_2_probability_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d828e7-3f3e-47dd-a4eb-ec8a50f1141e/calendar_2018_india_with_holidays_an.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28aac9a-5053-4e67-84be-105d23df72ae/mutavimizele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd23e0df-694e-4b00-9919-4f0166f19dad/wirogorumolotumebe.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_off0000d453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD453 4664 bytes
SHA-256: 392481f2c95fd5237b7627433b91df4d1f4d6db6c856f806d43cbc016df19f52
font_01_sfnt_off0000e432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE432 10748 bytes
SHA-256: d79be428216b0d94f4bca7e749677a2587b61914da927791b9d7ab65edd41b28

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