Malicious PDF — malware analysis report

Static analysis result for SHA-256 3296bd62d49ab855…

MALICIOUS

PDF

78.8 KB Created: 2021-03-03 07:37:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 878b1954a16bd29e151a52f709aa3d05 SHA-1: a261c94637405a14dbfa4335af8199e492eaef52 SHA-256: 3296bd62d49ab855964fea3403a963b9e9acb84563f70e621c7ee5d82105b1de
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a significant number of external links, suggesting a link farm or redirection strategy. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially malicious external sites.

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://vilenefex.ru/wix?keyword=action+speak+louder+than+words+example+sentence PDF link annotation
    • https://cdn.sqhk.co/perikowep/Zhjgedh/football_positions_abbreviations.pdfIn PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/220b06.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/jbhiEhg/apple_emergency_alert_noise.pdfIn PDF document text
    • http://ruwegekugite.22web.org/google_drive_default_folder_android.pdfIn PDF document text
    • https://cdn.sqhk.co/zakolemafemo/gjhagfe/lookout_tower_coloring_page.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/gic7WqW/xuxozudaluwub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471946/normal_5ff0012253b19.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/jDAhcja/72318423911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tuzakifezara/40976390507.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/kuwuxuvazitirowova.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/pasufokukogozadopavonuxif.pdfIn PDF document text
    • http://povutov.epizy.com/78211386042.pdfIn PDF document text
    • http://bosulug.epizy.com/ronoruzaruriwunat.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/81422102816.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 5408 bytes
SHA-256: c5ac6e41ec7ac415f69b8d89f6d891ab28d929a29efe6e8fb10cbc89f8b70933
font_01_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 10892 bytes
SHA-256: cc711307a8462e4fafe13b001450c00a432352ef1f25894f571da5fc815c0efd
font_02_sfnt_off0001200a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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