PDF malware analysis — malicious · 21f0da8f515ea02b

MALICIOUS

PDF

36.0 KB Created: 2021-06-26 10:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: b728df1129db3b3b51fe159a502cd19b SHA-1: aa38116495891be11018e5e2f0494b9f19896909 SHA-256: 21f0da8f515ea02b04340e8d719047d85d67147b2bdf2f16fd05d5f57ef408ae

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/robux-hack-script-pastebin-game-hack PDF link annotation
- https://www.mescosa.com/uploaded_files/userfiles/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/cm-daily-spins_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/nitro-fun-cheat-codes-vip-roblox-id_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/is-hacking-someone-roblox-account-and-transferring-their-robux-illegal_GM431946152.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
- https://www.mescosa.com/uploaded_files/userfiles/files/minecraft-tiktok-hacks_GM479516143.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_002_off0000334f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x334F	23008 bytes
SHA-256: `fcd20cef75e6eefe87f9b1eee7a85c1352849c2daf8017519f062b83ab993752`
`font_01_sfnt_off000066dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66DC	19276 bytes
SHA-256: `2cff379c3e52da1dce7e87e4073172cc99534ad9f0798be9a5ace1e21849dc0b`

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