PDF malware analysis — malicious · 9f91d1ad0e06d526

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 22:41:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 18ee2bdcdcb2453a360ff6d546f9fd64 SHA-1: 9b8af88da39204a54d14d67cb59a004ab959a2d4 SHA-256: 9f91d1ad0e06d52659d4ed82ee3a4ea0bec14fe4d8d1b2980421145334bda89c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacks, specifically for Coin Master, directing users to a suspicious URL. This URL, http://netcdn.tw/app/406889139/coin-master-website-game-hack, is likely to host a malicious payload or redirect to further phishing content. The presence of multiple similar URLs and the ML classifier's high confidence indicate a malicious intent to exploit user interest in game cheats.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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.tw/app/406889139/coin-master-website-game-hack PDF link annotation
- https://www.cinemapalace.ro/trailer/files/mad-city-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/green-roblox-hair-free_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/coun-master_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/free-roblox-faces-codes_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/how-to-get-free-vip-server-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/btools-roblox-hack-2021-unpatched_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/roblox-executor-2021-free_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/who-to-email-when-your-roblox-account-is-hacked_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_002_off000032f4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x32F4	23376 bytes
SHA-256: `aab2ce5d72a77178e3e92088fddf82a2662f61c2a0c2492f87e4a5bb224c3e98`
`font_01_sfnt_off000067c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67C3	18192 bytes
SHA-256: `d2203baa3f8808f575a7890d35593fb80413eb88c3c74b83b513cb0a3929aadd`

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