Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbc0e6a53018deb…

MALICIOUS

PDF

66.3 KB Created: 2020-11-10 23:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 89936b677faa233dc0bf37502f36fbd6 SHA-1: e51bc869ae2ca6bc9367dc46847abb4abe7afa67 SHA-256: afbc0e6a53018debe342aa35363899bb8cfefb0c72f67456a1ba6864cc1013fa
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords like 'white oleander pdf' which likely serve as lures to trick users into clicking the embedded links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?keyword=white+oleander+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_5fa6bd73558a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5fa14d04486ae.pdfIn PDF document text
    • https://juboxunogaruf.weebly.com/uploads/1/3/4/7/134700559/bufojatajamewud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5f9a8fcae9979.pdfIn PDF document text
    • https://kodowogokilikid.weebly.com/uploads/1/3/4/4/134466607/damugesigex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5f8bf53019bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f870d80ba632.pdfIn PDF document text
    • https://givudaxoj.weebly.com/uploads/1/3/4/4/134490896/wilanetapuzi-zelemosij-jizavodivaluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f888d3519c45.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/dazutun/ansiedad_por_separacion_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/dixipe.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/tsum_tsum_jessie.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/schumacher_xcs15_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/74009661731.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/94243953085.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_off0000c5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B0 4964 bytes
SHA-256: d27b49998f206e9c455b1a62d36272223bd832a4840b950b8a3ec601e43f381c
font_01_sfnt_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 10832 bytes
SHA-256: 142f2c847ad42514d23ffa5eb8e79c574c088f0ee0d4f5d404e9afb52758a3cf

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