PDF malware analysis — malicious · 3a8d9b79a63aac00

MALICIOUS

PDF

50.3 KB Created: 2021-06-08 15:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: e1ad5141092906d65ad1bcc379f81226 SHA-1: 5527727282b8449857a4947ca130955a5d52c9f4 SHA-256: 3a8d9b79a63aac0071e5f7a1c1f5fec8d50d0acd1e66b145b662c0f35964f1d1

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure impersonating Microsoft to trick users into downloading a Roblox hack. The embedded URL, https://netcdn.tw/app/431946152/roblox-twisted-murderer-hack-game-hack, likely leads to a malicious payload. The ML classifier strongly indicated maliciousness, and the presence of a download button heuristic further supports a malicious workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 4

Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/roblox-twisted-murderer-hack-game-hack.
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 https://netcdn.tw/app/431946152/roblox-twisted-murderer-hack-game-hack PDF link annotation
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/minecraft-hacks_GM479516143.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-free-car_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-roblox-items-catalog_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
- https://elearning.mtsngresik.online/__statics/gudangsoal/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000520c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x520C	28768 bytes
SHA-256: `ace6357348319502a7af16012037babc6f76102d7fe97d497d61b811a41aeaea`
`font_01_sfnt_off000092ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92EA	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off00009f92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9F92	19080 bytes
SHA-256: `084b3a83dada13c5c0c96bae0f9b3d65a2b9ca4b8369d6342907dd2ec3825167`

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