Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb87a0091b4310c0…

MALICIOUS

PDF

75.4 KB Created: 2020-11-26 01:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0a2044a75006fc266f367512b811c6c5 SHA-1: 177f5ed9ab7af240b09ff4a2e2c481929a37f573 SHA-256: fb87a0091b4310c0df4313d05f671c87023a53684bd0496398746fa27d5c42a8
96 Risk Score

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=bob+gill+graphic+design+as+a+second+language+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5f8e7eff49eb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5fbd25eede03f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f950fa2ca563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_5fa49bf141816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468571/normal_5fa7f7901f3df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5fae6e75483f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f88b0cc5873e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f9521cd37e48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_5fb67cf0274d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f8e26d3d2f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5fbee3a29c520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485939/normal_5fa92e9598971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f99a0ec9e2e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8975ccbaca8.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/zaxawetawupo/gabijomapar.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_off0000ea36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA36 5604 bytes
SHA-256: 337d5f53698d7817be76345d070b02d4226811080eba83f392e851d5b5990a35
font_01_sfnt_off0000fd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3D 10288 bytes
SHA-256: 57de7613bc099207c78a1d6cb9db5983ab1d45c9488bd47d54003f1036b6e7ae