Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f559f3af1d2d2e…

MALICIOUS

PDF

59.8 KB Created: 2020-12-18 00:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3620cdcf8234328331d73677afdf593f SHA-1: 1c0cf442bb2871a1ef886a3ee742f65ae0245634 SHA-256: 99f559f3af1d2d2e566ae9c937e83edd86e90a06ba704ccfe792b7e8a05e5672
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a movie theatre search, suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://traffking.ru/123?utm_term=yorktown+movie+theatre+lombard
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f8a405c8828a.pdf
    • https://static.s123-cdn-static.com/uploads/4451742/normal_5fcbfe3f2e314.pdf
    • https://cdn-cms.f-static.net/uploads/4419640/normal_5f9f983072d5b.pdf
    • https://cdn-cms.f-static.net/uploads/4413585/normal_5fd7a2722a978.pdf
    • https://cdn-cms.f-static.net/uploads/4421214/normal_5f9e7f7e223a3.pdf
    • https://static.s123-cdn-static.com/uploads/4367624/normal_5fc4aa653967a.pdf
    • https://cdn-cms.f-static.net/uploads/4488822/normal_5fb4a1da80254.pdf
    • https://cdn-cms.f-static.net/uploads/4370269/normal_5f9b3c77e35f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc384fde5c7695ca9ac2351/t/5fc56d7008845d092442569d/1606774129299/strawberry_wine_lyrics_country_song.pdf
    • https://s3.amazonaws.com/wopari/15971649203.pdf
    • https://static1.squarespace.com/static/5fcf0d4c7d46c3615fb05a19/t/5fd1ae0c99fe644e8a5df22a/1607577101679/sukew.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_off0000b0e3.bin
a9c3df644b8621c5e7d59f42d55ffa7f83a7aa864f01f2c6a687d41d0cc53540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E3 5204 bytes
font_01_sfnt_off0000c27d.bin
1b50f671f467a2d2888cdcfe38ba5f95f642d18f696967132747d39099c8809e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC27D 9412 bytes

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