Malicious PDF — malware analysis report

Static analysis result for SHA-256 b251f96af22ae255…

MALICIOUS

PDF

46.9 KB Created: 2021-06-07 05:28:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3493cc60fc7ec0308b625d98abf86189 SHA-1: 3016019d5c4ba2b21b561c1dd393cf4604cb8650 SHA-256: b251f96af22ae255f85f2b241abce04b0d44e3ef174e215bc2dd7e92d25666ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and redirects to a malicious URL. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a potentially harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/pastebin-robux-promocode-hack-2021-game-hack PDF link annotation
    • https://dinpertan.grobogan.go.id/images/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/pokemon-go-free-7-days_GM1094591345.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/roblox-free-pets_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/coin-master-free-spin-and-coin-link-app_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_004_off000055c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55C4 26184 bytes
SHA-256: 329d4d939e33b13d890e75a1abbe1986f280afe73644b6827d255f0fa402ad4e
font_01_sfnt_off00009119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9119 19464 bytes
SHA-256: b6a246e8b5b630a40b7e1e843c61545adeebc307e95b22271122b3772c718ed0

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