PDF malware analysis — malicious · 059123d502fcbb3e

MALICIOUS

PDF

43.6 KB Created: 2021-06-09 11:29:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 78d477af1360b4991a35529350229f7c SHA-1: 759d87b724941a1aefe4dd5eef68bb232c8388e6 SHA-256: 059123d502fcbb3e65c67c35eb400a6adb74164eac033a916a7e4d3509652cb3

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with a malicious link. The embedded URL, https://netcdn.tw/app/431946152/robux-hacks-inspect-way-game-hack, is likely intended to lead to the download of a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 4

Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/robux-hacks-inspect-way-game-hack
- http://elibrary.smknesbu.sch.id/repository/roblox-texting-simulator-money-hack_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdf
- http://elibrary.smknesbu.sch.id/repository/how-to-get-free-hair-modles-roblox_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/robux-generator-no-verification-2021_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master_GM406889139.pdf
- http://elibrary.smknesbu.sch.id/repository/how-do-you-hack-roblox_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/blogger-coin-master-free-spins_GM406889139.pdf
- http://elibrary.smknesbu.sch.id/repository/cm-free-spins-and-coins_GM406889139.pdf
- http://elibrary.smknesbu.sch.id/repository/free-spin-coin-master-2021-link_GM406889139.pdf
- http://elibrary.smknesbu.sch.id/repository/roblox-frappe-hack-script_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/minecraft-115-2-hacks_GM479516143.pdf
- http://elibrary.smknesbu.sch.id/repository/free-robux-hack-no-verification_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/coin-master-34-4-free-download_GM406889139.pdf
- http://elibrary.smknesbu.sch.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/hack-jailbreak-2021-roblox_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/500-free-spins-coin-master_GM406889139.pdf
- http://elibrary.smknesbu.sch.id/repository/free-robux-discord_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdf
- http://elibrary.smknesbu.sch.id/repository/free-roblox-gift-card_GM431946152.pdf
- http://elibrary.smknesbu.sch.id/repository/free-robux-gift-card-generator_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00004f25.bin` `4784242e77d53838ebde570b3d7b2ac9c500302f114b2d6a6445875ebd739507`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F25	24000 bytes
`font_01_sfnt_off000085b1.bin` `22a5f3ac5958fcadf8024fb7a72f2f50eeba4dbe118047638728d5b1290974c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85B1	18908 bytes

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