Malicious PDF — malware analysis report

Static analysis result for SHA-256 03590ed351f59ee9…

MALICIOUS

PDF

70.3 KB Created: 2020-12-05 05:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dd49723a6ad8d690284e09bece1e66eb SHA-1: bf020fc157ef31139664db32ec07cc5249f9d61f SHA-256: 03590ed351f59ee931b15dc9a75450688e596aa600f258817aefde6ee4d5ceaa
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://trafffe.ru/123?utm_term=what+is+the+purpose+of+the+declaration+of+independence+and+the+declaration+of+the+rights+of+man PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412908/normal_5fcacead70b41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5fc3de2bab2d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450351/normal_5fcaecb771a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_5faa325273181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f93fd5e8526d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481157/normal_5fb9f1d2e67e7.pdfIn PDF document text
    • https://marejeloxivel.weebly.com/uploads/1/3/4/7/134709382/gizaxatosotep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f92587a1477b.pdfIn PDF document text
    • https://ziridizozavixik.weebly.com/uploads/1/3/4/4/134400570/lomutuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495042/normal_5fb5cb7335791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_5f9ceffd521d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5fb8a4be07e9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403127/normal_5fcab8edd3cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_5f9d001720a3b.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/wazagidonux/algebraic_topology_allen_hatcher.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cb37f2297e36a9fa3dd4/t/5fc7c3bfa3696915e23265c1/1606927296107/67091265290.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/green_screen_plane_video_free.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_off0000d5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A4 5580 bytes
SHA-256: 663ab3a4c7dd167db216b0ca6857798e5c4633438ac1aa3b814d1835089dbcd9
font_01_sfnt_off0000e885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 9976 bytes
SHA-256: e38bd2430fa8d87b551c399d13b24743acf24b5d751731359746c867948ff35f

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