Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfd74cbd3f13dee…

MALICIOUS

PDF

46.3 KB Created: 2021-05-13 21:37:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4b6482f5efe6a36cc4b89a78f51d03b3 SHA-1: 20f867a42678f3943cee1256e693ee0fbe60b24a SHA-256: 2dfd74cbd3f13deed777f3998da4aef6d6ad00f0b6f98d7c30017a704e4b61bf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that promise free game currency or hacks, a common lure for malicious downloads or phishing. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior. While no scripts were directly extracted, the embedded URLs suggest the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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-robux-no-verification-2021-game-hack PDF link annotation
    • http://pianoservice.com.ua/images/get-robux_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://pianoservice.com.ua/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004788.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4788 25832 bytes
SHA-256: 465c4693df8db56d37a4692995d3e7f6622d554001ed3697800b47a4b4bc0195
font_01_sfnt_off000083a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A1 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9049 19004 bytes
SHA-256: d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2

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