Malicious PDF — malware analysis report

Static analysis result for SHA-256 655fd9de7c23a936…

MALICIOUS

PDF

79.4 KB Created: 2021-03-12 21:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da95ee9428c5c6b9f120b055a770770c SHA-1: 7d369f99d9d076f4c4d7d46b9db3a68ab05977c5 SHA-256: 655fd9de7c23a9365c45acb1165495e2c217819faab6f43adc25d4fd117c7a9e
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a phishing attempt. The embedded URL, 'https://baarspo.ru/123?utm_term=background+wallpaper+hd+for+windows+10', is likely used to deliver a secondary payload or redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest an attempt to exploit user interaction for malicious purposes.

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://baarspo.ru/123?utm_term=background+wallpaper+hd+for+windows+10
    • https://cdn.sqhk.co/lomasamube/iv8jh7N/contract_killer_zombies_2_ios.pdf
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc72a79c953c.pdf
    • https://cdn-cms.f-static.net/uploads/4486751/normal_6024aa97d3985.pdf
    • https://static.s123-cdn-static.com/uploads/4420244/normal_600819efc3a18.pdf
    • https://cdn-cms.f-static.net/uploads/4374364/normal_6010776b56503.pdf
    • https://cdn-cms.f-static.net/uploads/4425487/normal_6035359cb19bb.pdf
    • https://cdn-cms.f-static.net/uploads/4490930/normal_60205238ce3ce.pdf
    • https://cdn.sqhk.co/roxirali/hbIjawZ/solegipuvusuletaxepumez.pdf
    • https://cdn-cms.f-static.net/uploads/4379969/normal_6014f5058641f.pdf
    • https://cdn.sqhk.co/posojuvapono/z0jejeL/velodrome_bike_cost.pdf
    • http://nesozolifagezol.22web.org/wigekubawikixo.pdf
    • https://cdn-cms.f-static.net/uploads/4463554/normal_601521090a3b2.pdf
    • https://cdn.sqhk.co/dijowasedop/9jjZUhc/toca_life_city_free_download_ios.pdf
    • https://cdn.sqhk.co/najiligopej/djfhbjd/5950860222.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kopididutal.epizy.com/jexofavigilafuwujoga.pdf
    • http://gagafexekoxoseb.epizy.com/jazz_piano_sheet_music_autumn_leaves.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec24.bin
85e14a2d47d37844d09b66c34538ecec36d1f406ca5a6416633ac039bba3b691
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 5620 bytes
font_01_sfnt_off0000ff4c.bin
401523bed3ecefefa6264a0ddbfca6eadf8839b3c9f474d4534de7b2bfec38e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 10208 bytes
font_02_sfnt_off00012230.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12230 4324 bytes