Malicious PDF — malware analysis report

Static analysis result for SHA-256 a382b2cad5be1041…

MALICIOUS

PDF

77.9 KB Created: 2020-12-22 20:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fbb2ceec94ff22b8c5694b7bdd14fe1c SHA-1: 4c31a1d880dda41c889c142d1543b4c44798aadc SHA-256: a382b2cad5be1041da3a430c7fce32f8c53ccab2978bc7de3f2f39fc2fe505f2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. While the document body is heavily obfuscated, the presence of the external URI suggests a phishing or scam attempt, likely related to employment lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=amazon+driver+pay+scale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469634/normal_5fb5b396f365a.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/jukoxisojow/bifetavasinibiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/wefakemupolele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6cabdc-1d30-409b-8023-98bb0905d7db/33737403789.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/bang_bang_song_free_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b0b38d-ad37-4bbb-923f-6dbdd8a2b2e9/buzifajezafobuvibotejawak.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/california_driver_s_license_test_cheat_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3a46c8139af037656512a/t/5fca528224f9027de3a71965/1607094914713/mma_manager_mod_apk_prey_studios.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/22159120276.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/eu4_guides_castile.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/15255160745.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/increase_and_decrease_percent_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b36fe98-b8fe-4a2a-a83b-1ca3678cb70d/photo_license_center_harleysville_pa.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_off0000e792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 5420 bytes
SHA-256: f6f62a5d2b88af78845efd9dc599937aeba169cf8c1aef13ca3d117e999d2012
font_01_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 16260 bytes
SHA-256: de2c837c00654baa122f8ab26e2a195e1441dfc78803c44aafc4334e2cdc2985