Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49f96a5e9c5b0f9…

MALICIOUS

PDF

69.5 KB Created: 2020-12-25 17:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c9f62e0c908f9b00cd187132bdac7895 SHA-1: eaa4c7454071c0c51909935bc91ac9aa096a63d2 SHA-256: a49f96a5e9c5b0f955392ed4a08a5a65381f1e932b31e67f943764726e1cb2b9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to games, suggesting a lure to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=dragon+vs+dinosaur+hunter+dinosaur+games+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456671/normal_5fbfb51f4ce10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_5fb47e895bfc4.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/46d7755f-71a0-4baa-ac64-0570f9b5f7cf/12686850989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecefb6c6-3541-4979-a6ff-eb8c1778bbdb/north_reading_high_school_summer_reading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0af487d-3fbe-4fef-b19c-72affa2bd5d9/90654657658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc586f23-f6ca-4ee3-befb-6149db427c03/rival_20_quart_programmable_roaster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaa0ff3-33f2-46b8-9ded-2347a4fce5c3/21155875752.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/52437093150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db13e58-c3d5-47a5-b0d7-8fe49c5a0924/fozidobovitozexeferot.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/valentine_s_day_card_printable_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ce6685-044d-4ee5-b1f2-4dd9d6daa3fe/arctic_tundra_natural_resources.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e19a450-b178-4b16-affb-6472ef4b0bb8/lake_hills_church_waynesville_nc.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_off0000d5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C9 5296 bytes
SHA-256: 8759081fa2a12c930aafdadffd965ec9aef0a4fca768c25555c6a08cf26b82c7
font_01_sfnt_off0000e7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 9880 bytes
SHA-256: 966481e6eac8439c37d185f404aff670eff1e4d6b15a368b619b19580baac4ca

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