Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc9ab6e13d4fbc1…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 01:11:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fc233db4b2cd9508223b117478f46132 SHA-1: 809a601bacf62e278fc28ce3a0c97ab87587078e SHA-256: bfc9ab6e13d4fbc197ff2abed51f22acac6157dc8c8ef523ef203638b6f6e1d8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'coin-master-daily-free-spins-link-today-2021-game-hack'. This heuristic indicates the document is designed to trick users into visiting a site offering game cheats or hacks. While no scripts were explicitly extracted, the nature of the lure and the embedded URLs suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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.tw/app/406889139/coin-master-daily-free-spins-link-today-2021-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/buildtools-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-summer-grl-roblox-skins_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-magic-training-wand-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/auto-clicker-for-mac-roblox-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/pastebin-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-116-free-download_GM479516143.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_off00003007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3007 22692 bytes
SHA-256: 9359165a7efd93d8fda1490187cbcda329793bd4c48756ee55267a835a7d78c7
font_01_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 19344 bytes
SHA-256: bda18ad7bc028b2989dfdc10c84b9c87c1dbf0242a88a3a6fbf9217f203e509c

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