Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36eb74a56ae97d4…

MALICIOUS

PDF

295.2 KB Created: 2020-12-09 21:38:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 63ad27946954cb10e6a16dab55a2f703 SHA-1: 1d6c51ddc55c52567e64fa97015745fc5f25d6e5 SHA-256: c36eb74a56ae97d4ff463eaf3dff7c3a8baa0f537ce80736aa8171eaeef7aea7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'trafftec.ru', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, but the presence of the external URI and the overall malicious verdict strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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://trafftec.ru/aws?utm_term=ccs+stable+angina+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460228/normal_5fc04d6eb1d69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f93c4303ee31.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/322b70289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f92afa068a5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_5fa01dfdebaf6.pdfIn PDF document text
    • https://puniduvete.weebly.com/uploads/1/3/4/3/134341297/pejexenis.pdfIn PDF document text
    • https://lomedalepa.weebly.com/uploads/1/3/4/4/134438906/fubakif-begejirapisawi-xufabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe04ad3c6ccf69f325610d/1606288558121/zomudedajizulosulo.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/audifonos_bluetooth_motorola_s305_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/rulisefigexo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66f5c6b97992eb581654e/t/5fcaaa56980ea222adc5064b/1607117398472/thunder_stock_cars_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b178a13a450babffaf53/t/5fc5cdf308845d0924541cd2/1606798836226/42605815078.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64468403f5353fdba117f/t/5fc8085f6caedc302dbf06bf/1606944864233/42702548831.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e727ea4a794d5645064f/t/5fc325a961e25426e19f05f3/1606624683521/32046122173.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_off00044e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44E58 5056 bytes
SHA-256: 63ba609624ae832f0d4c243c4f5afb5cbd8e645d9a7ae90ecf9087f52f7df507
font_01_sfnt_off00045f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45F96 14704 bytes
SHA-256: 5f00eee92c736a566472461e202171f1556713a2d74c1911afbfa41f5baf9973

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