Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf92a0aa482637d…

MALICIOUS

PDF

77.9 KB Created: 2020-11-25 22:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7f99dfb387e92c8be41eec3fda77bba9 SHA-1: 78e83e8a7a72970c5dd3f3348a3d9ce1be1b2bfc SHA-256: eaf92a0aa482637dc90cf52203c2c6eea0cf421831332166b962ffa10ea8303d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The PDF structure and embedded content suggest it's designed to trick users into visiting the external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=codingbat+string+3+solutions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f871d56efe7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421360/normal_5f97985d16aac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5f9097e0be57e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5fb7915d6641d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_5fa957d71e21b.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/juzinaramip/79556373298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8d0981-dcbd-486e-95af-b4fee203a059/southeast_region_study_guide_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/riesgo_financiero.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/kuxudutituwasotowutig.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/ap_world_history_unit_5_study_guide.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f9a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF9A5 27388 bytes
SHA-256: 9b97ab9ab2463909240da0f47ee1b6fd8f0b1ecb3b849e15c9d8268d5d427248
font_00_sfnt_off0000c2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D3 5200 bytes
SHA-256: 8cd9a7aaea4a72ac031ad3cd7b74a367fb219fef4903ea02bce0d8ec7adc093c
font_01_sfnt_off0000d480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD480 10728 bytes
SHA-256: fdf1c87907f264e628140d12fe8ce313f3419c55d543ac1288f202848b6d8a9c