Malicious PDF — malware analysis report

Static analysis result for SHA-256 a242644989d27640…

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 13:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0456949973d428c96b14cb2c83a6dc24 SHA-1: 69db6bbb63e091ade9e3541240dc013421f94f28 SHA-256: a242644989d27640676342fd80145eece8ff6deaf33b949a925f9fcc3f8f05f4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing indicating a game hack redirector lure. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-rep-on-roblox-got-talent-game-hack, is presented as a way to get free in-game items. This suggests the document's purpose is to trick users into visiting a potentially malicious site for game-related cheats.

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/how-to-get-free-rep-on-roblox-got-talent-game-hack PDF link annotation
    • https://edu.kyst.com.tw/image/data/files/get-roebucks-com_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-free-muscles_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-free-dino-hat_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/hack-adminisrtateur-roblox-2021_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-hack-download-unlimited-robux_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_off00002fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCD 22352 bytes
SHA-256: 8bd0252380393f33a44a778c4ef9dcfa73b3d149e45a4cd5235f91adeafa85f8
font_01_sfnt_off0000617f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 19092 bytes
SHA-256: 4e6e8af3320440250fd7faab95818738270c2a038fb2c6987b17cb61f7ce494f

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