Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb65d62ba9ff9771…

MALICIOUS

PDF

74.0 KB Created: 2021-03-03 05:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daee8f4ac44182b5eef5733758c450d9 SHA-1: d9c660c68aafa5df4df9f518d5e4185392ac0884 SHA-256: cb65d62ba9ff97718763c3dea8f0ebec34dc7f9a5d2f57e012640e255d6e8723
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains references to 'Amazon kindle fire hd 7 4th gen', suggesting a lure to trick users into visiting the malicious URL. The presence of embedded URLs and the overall detection by multiple security tools strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pelibifir.ru/strik?utm_term=amazon+kindle+fire+hd+7+4th+gen
    • https://cdn.sqhk.co/remimidotomi/fZgfNdf/femazaki.pdf
    • https://cdn-cms.f-static.net/uploads/4373516/normal_603093a3df137.pdf
    • http://birjand.design/stock_market_technical_analysis_chart_patternshp6bk.pdf
    • https://static.s123-cdn-static.com/uploads/4426945/normal_600861f109154.pdf
    • https://cdn-cms.f-static.net/uploads/4426972/normal_602c4db8488b8.pdf
    • http://constructionhouse.info/50536717202mko2s.pdf
    • http://igcopyrightclient.com/4161647087517p4u.pdf
    • http://idealicaitaly-ufficiale.site/kadotaze9i3q3.pdf
    • https://cdn-cms.f-static.net/uploads/4488135/normal_602706ffdfd73.pdf
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5fd69b29965fd.pdf
    • https://cdn-cms.f-static.net/uploads/4369651/normal_602e6cbb183f3.pdf
    • https://static.s123-cdn-static.com/uploads/4366041/normal_5fc5782826141.pdf
    • https://cdn.sqhk.co/lazimafuxuxi/fhaRER9/wixalijesof.pdf
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc60261c18a7.pdf
    • https://cdn.sqhk.co/ravusigi/idgepha/universe_sandbox_2_free_play_no_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dozore/rufuri.pdf
    • https://s3.amazonaws.com/bezutu/dmarc_forensic_reports.pdf
    • https://s3.amazonaws.com/fazujo/16451734902.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ff.bin
3db94992717499d5993aca9b17adf46342a9095f85c733ded914db531163deb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FF 5416 bytes
font_01_sfnt_off0000f854.bin
207d3f76b4e373df48b7bdc59f5850e161c4d25fb68d2467785b9edac2a21741
pdf-font-stream PDF embedded font (sfnt) at offset 0xF854 10160 bytes