Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf778d013fd0f64…

MALICIOUS

PDF

35.0 KB Created: 2021-06-17 19:23:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 754983435caad5212df568588c39fd7a SHA-1: ccb9d3dc59e50660cb5a829c55a1b5263e4ad1ff SHA-256: bbf778d013fd0f64e9512717023d67429857494ff7a5884b25ed7d5552e2fcf6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of free game items or hacks for popular games like Roblox and Coin Master. The primary URL, http://netcdn.co/app/431946152/roblox-free-promo-codes-thumbnaill-game-hack, is flagged as a game hack redirector. This suggests the document's purpose is to direct users to potentially malicious websites that may host scams or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-free-promo-codes-thumbnaill-game-hack PDF link annotation
    • http://hk-kan.org/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-csgo-hacks_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-roblox-gift-card-codes-reddit_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-secret-page_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/hack-para-simulador-de-levantamento-de-peso-3-roblox_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/robux-cheats-2021_GM431946152.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
font_00_sfnt_off00003112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3112 22312 bytes
SHA-256: 077f2004da00b18a5698b4a8faf46ce86f99ce1625989d627b07f81b02242e11
font_01_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 19476 bytes
SHA-256: 691c4613cb4d7e9024018411897a6e505cac2adaf18a434746542c45c44961da

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