Malicious PDF — malware analysis report

Static analysis result for SHA-256 073af5f8c53bafe3…

MALICIOUS

PDF

44.0 KB Created: 2021-05-13 12:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 440448035bfe4450b1a31fb0245c818a SHA-1: 5730a30e3da80a9fc59fd4dac7f304ca0f12b1e9 SHA-256: 073af5f8c53bafe334e0cc756afa1ce0da137f7fb703d83e78960fd35824f485
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.xyz/app/431946152/free-roblox-website-game-hack PDF link annotation
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-map_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/mcpe-116_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B53 27416 bytes
SHA-256: 1433ab75d79f78f2d90e161c1e393af571e3a9e1241176f379e7ad424d8b8676
font_01_sfnt_off0000898c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898C 18372 bytes
SHA-256: 4f49704c3d2016fd3d486e698c5af7a9a5561cf776b84bb9dfcb3ffa887994c7

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