Malicious PDF — malware analysis report

Static analysis result for SHA-256 19577f5dbe25f373…

MALICIOUS

PDF

64.2 KB Created: 2020-12-25 07:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3b9d83b2a6a835de39cf3bbf5cbe1948 SHA-1: 869c325c53be8458524778893a958812b585dd0e SHA-256: 19577f5dbe25f3737ebedbd6597501bec89fbbe173e7c35897a4644c48bd95d2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site. The document body, though heavily obfuscated, appears to be related to a 'Nintendo Switch review', suggesting a lure to trick users into visiting the malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://traffset.ru/strik?utm_term=judge+nintendo+switch+review+philippines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484990/normal_5fd928405518a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f89cee68ed84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457281/normal_5fd671527b7c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_5fb81968b9ad7.pdfIn PDF document text
    • https://cdn.sqhk.co/feneradebeza/1WiaUqU/53310172510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503987/normal_5fc569bec341c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f9062ed54fc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_5fbf5d774f9aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489402/normal_5fc117e79bb6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392659/normal_5fe540fca30ea.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/ibjfPKM/79823310013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a226e67c-256d-435a-8694-3e9eada34222/pinewuluvewaxekofane.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/6529852038.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/wikipedia_fox_searchlight.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_off0000c027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC027 5268 bytes
SHA-256: 0a8d7d69391d690892748e7629e25d1903d6a9f3a977676d6330003fb5f3e5c9
font_01_sfnt_off0000d226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD226 9896 bytes
SHA-256: dd9c8b8cfdc202d66cc1710f7739def70cdc2768a47060c05557ed5eed70d86e