Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d87108953ad0145…

MALICIOUS

PDF

90.8 KB Created: 2021-01-09 17:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 3a6ccad497d4cdbe75072d2e4cccebfa SHA-1: ab0f742fe7f8b64c210df8d2ef0765320efd625c SHA-256: 3d87108953ad01454410a3fbec3e79a54164c4cf6c056655444f2a0574d4bc84
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, one of which is associated with a game keyword and has an unknown reputation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of suspicious URLs and high detection scores suggest it's a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://trafftec.ru/wb?keyword=space%20hunter%20galaxy%20attack%20arcade%20shooting%20game PDF link annotation
    • https://cdn.sqhk.co/jivomawufem/iijcOhh/72604176800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369146/normal_5ff69387a35a4.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/MXvNija/31729152212.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/zuxizakabe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_5fde7bf19317a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478923/normal_5fccfbd680020.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/wizoregeliga_latudaripuxika.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/xidazeze/81321548761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77840c26-5652-4314-95cd-3ab9c4672ecc/apqp_checklist_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/cricket_website_templates_free_bootstrap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7e9f8ad-6e39-433c-bcd3-345aebb3ee25/sprint_store_1604_and_blanco_rd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e624b6f-e3a8-44a9-9921-4abd11f68811/29248463860.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 3644 bytes
SHA-256: b8885342255674237a8df956d05707bc5e0f75d67a6d452969daf27001436304
font_01_sfnt_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 5824 bytes
SHA-256: f5c570f986ab610eab42695febc324bfd2b0c7252996c65bfc4ae1e7521a3460
font_02_sfnt_off00010db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB0 4416 bytes
SHA-256: c7d10694666921d19e1c364255db7ff9018334200093c9108352f21d0a90d454
font_03_sfnt_off00011ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE5 11068 bytes
SHA-256: d500df5045b7fbaf0bde98a330a610d65c598541891392a84d18a829ad8270a9
font_04_sfnt_off00014520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14520 16844 bytes
SHA-256: ccea592b4c119fa286d60b02c940383cb71b794cec97098497774b10dff02bcd

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