Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1598d3d3e11b6d…

MALICIOUS

PDF

65.6 KB Created: 2020-11-10 14:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: febce7089d5f23db5a5e222ab3b36d73 SHA-1: 2d634ab07f12fb1c95ebc10d115013617e86ee54 SHA-256: eb1598d3d3e11b6d3c422b8bab36baf490933f2d45aec03858734b12c4f372e1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely used for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain text related to 'Graham middle school', suggesting a targeted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://traffking.ru/strik?keyword=graham+middle+school+mvwsd
    • https://cdn-cms.f-static.net/uploads/4456143/normal_5fa747f2a5df5.pdf
    • https://cdn-cms.f-static.net/uploads/4392666/normal_5f9456a01bbe6.pdf
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f8a862849056.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bfc1b7c3-6509-493e-b14e-f18cd028be5f/concave_and_convex_lenses_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/eeafd4bd-675a-484e-806c-fff7fd4adc49/21235050623.pdf
    • https://s3.amazonaws.com/sevoga/neoliberalism_book.pdf
    • https://uploads.strikinglycdn.com/files/ed6b678d-ff17-4bd4-9c50-ea2b601f6bbc/42365399337.pdf
    • https://uploads.strikinglycdn.com/files/180e79fd-1ec1-47a7-9908-5430c822d3c8/quotes_about_unconditional_love_and_acceptance.pdf
    • https://uploads.strikinglycdn.com/files/53780e68-6965-492f-8f1f-2255a9e714e0/ismail_adC4B1gC3BCzel_tarihin_pusulasC4B1_2020_soru_bankasC4B1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c51a.bin
9af7eb8884ea046bf74d38cf732ea4a1c3fe5bb0c3670a9859097cd54956fa2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC51A 5364 bytes
font_01_sfnt_off0000d73c.bin
781eae70a28887964c4cf8b53a90903f341b778b497729202c5cf15cc89afc90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD73C 10224 bytes

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