Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95e7905b69dc1f9…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 14:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b90af37ce811bc71cf7c926a1ca15650 SHA-1: 0140c928e6668e7986c97d47c05b1705716784fa SHA-256: b95e7905b69dc1f98c7bb11a0398def7ee93cdfd4d7907733d4b73986ecf02f3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body and embedded URLs reinforce this theme, suggesting a scam or phishing attempt to trick users into visiting malicious sites. No scripts were extracted from this sample, but the primary lure is the embedded URL.

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-hack-mobile-game-hack PDF link annotation
    • https://edu.kyst.com.tw/image/data/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/can-your-roblox-account-get-hacked_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-prisoner-life-speed-hack_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/get-robux-today-free_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-roblox-generator-activation-key_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-download-free-full-version-pc_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/hack-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/muscle-simulater-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/comment-gagner-des-robux-sans-hack_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-no-survey-2021-ios_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/barren-roblox-hack_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_off00003064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3064 22792 bytes
SHA-256: f0a18f61aa43a549ce2abb5f2196b9fb27a0df4030508eca288bc17871b12f99
font_01_sfnt_off0000635b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635B 18236 bytes
SHA-256: 6a735436479ff0aab11f95a41c40e0b9404f26c9454ddfcce58982a18e600178

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