PDF malware analysis — malicious · d2c1675de8a71967

MALICIOUS

PDF

43.8 KB Created: 2021-06-10 21:19:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 499d521e44188dca226ac2e66bb15423 SHA-1: 8880295ecb79b401a35835ee70235bc025e712f4 SHA-256: d2c1675de8a719677a6751b3e39f8f657bf70bcca074d408e99e8a7014cc500b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a game hack lure to entice users into clicking a link. The link, 'https://netcdn.tw/app/431946152/roblox-robux-online-hacker-game-hack', redirects to a malicious domain, likely to download a second-stage payload. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains external URI references consistent with this type of attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-robux-online-hacker-game-hack PDF link annotation
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/fre-robuxe_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/get-free-roblox_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-team-fortress-2-free-to-play_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/im-gonna-hack-roblox_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-free-draw-trolling_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/cheats-roblox-paintball_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-hack-into-roblox-account-roblox_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-shionbi-life-max-lvl-hack_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/how-to-develop-a-noclip-hack-for-roblox_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/glotis-how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/jailbreak-free-money-roblox_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/free-robux-using-points_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/bleu-roblox-hack-key_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/esp-roblox-hack_GM431946152.pdfIn PDF document text
- https://altaviastagerace.it/wp-content/uploads/fsqm-files/roblox-hacked-com-2021_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.

Filename	Kind	Source	Size
`stream_004_off000051be.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51BE	24016 bytes
SHA-256: `562a2e3cf249a2900da48b3aca583599feaad6b3c2e25d4c7ee5fea203cf9d1f`
`font_01_sfnt_off0000882f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x882F	18444 bytes
SHA-256: `1870bd1ad9a0e09441b2aad68322209e942cb7b39da5ff2b2af7207c5a2baea4`

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