Malicious PDF — malware analysis report

Static analysis result for SHA-256 469b325b5d9e5363…

MALICIOUS

PDF

64.9 KB Created: 2020-11-16 18:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a8af23db8c67313e248e594df88b7322 SHA-1: bd188f8acca4e3c6903e5b12bf525a10f469fd86 SHA-256: 469b325b5d9e536324251a88c88c4077494b8108f468d254aea802a341943b4f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of an external URI suggests the document's purpose is to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=monarch+academy+annapolis+principal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5fad7a09a3f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f881362e50a1.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/3de5ed36-fbc7-4e94-bd9c-cdfb9b7d439c/xewadalulejukorat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed254dd-5c80-428e-8f47-9f474f023f03/amcat_mock_test_papers_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dc23b49-bf1d-4d98-91a1-f2bb2828ecb8/unblocked_games_77_2048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aae6399-ff9b-4899-a441-abac438a99dc/neramejijevakoverefesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f07c9c7-cd87-4544-8836-a893bd047d07/kategibikelovusim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3403c27f-fa71-4d8a-b0d7-c5faa3889e35/vakapetibudol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f0671c-87ad-4728-839a-18a2f968aaf5/14248113856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563f8914-31f7-479a-accc-2d8972e4d22c/kakan.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_off0000c2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B6 5420 bytes
SHA-256: 5bf342e60c608f28ffec1c3abfd04241c52041a39490d938ec9e1b7afe31ebb4
font_01_sfnt_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 10164 bytes
SHA-256: 8a13aed0d6ccd3c6975f4553e0c6b6fec750c8e8268d476d959ca439c8e71783