Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b52deb72f20688…

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 21:51:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4f50d71116e8e6d831e8200a95f23726 SHA-1: 191d2ea61b9ea6dcdc13aea2b254feb47ce0f33b SHA-256: 09b52deb72f20688c78a51b06db2676b24d450b2271abcf26cef92c2fb133b32
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacks and free in-game items, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. The primary IOC is the external URI pointing to a potential scam or malware distribution site.

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/how-to-get-free-coins-and-spins-on-coin-master-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/pubg-uc-seller_GM1330123889.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/groups-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-android-no-survey_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-pe_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-save_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_002_off00003007.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3007 23292 bytes
SHA-256: 8b85e3ccc05467fa05fc3698b32e646765a5ef08a8cc279365c4f30c16ae08c7
font_01_sfnt_off00006460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 18512 bytes
SHA-256: 424bb9f7d94b67ad84700b70a02028b1b6556dd683a574deb4b835b998210ef2

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