PDF malware analysis — malicious · d1dea173b246709f

MALICIOUS

PDF

49.6 KB Created: 2021-05-12 16:01:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: e613d80237a02a14852a299fed45ee7e SHA-1: e937f7b9f7fe136038edc51f75296b75f8d5972f SHA-256: d1dea173b246709f3a8a2f5fb4acc2b7dfde741fd6bed37fbbb8619d2885da80

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document employs a common lure of game hacks and free currency to entice users. It contains multiple embedded URLs that redirect to external sites, such as 'https://netcdn.xyz/app/431946152/how-to-hack-roblox-accounts-for-robux-game-hack', which are likely designed to host further malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection behavior.

Machine Learning

Nyx PDF Classifier malicious score 0.9349

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.xyz/app/431946152/how-to-hack-roblox-accounts-for-robux-game-hack PDF link annotation
- https://www.anders-sofa.com.tw/uploadpic/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/free-robux-script_GM431946152.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/coin-master-free-2021_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/coins-master_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/roblox-bux-free_GM431946152.pdfIn PDF document text
- https://www.anders-sofa.com.tw/uploadpic/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- https://Buy.HoaxMC.comIn 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
`stream_003_off00004b56.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B56	29956 bytes
SHA-256: `f85cdd313e4eac8f9238eb3b6b4de99f6a24314461f3682255486eef6028d6e1`
`font_01_sfnt_off00009041.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9041	4192 bytes
SHA-256: `e17e28f7a7725f9193ccbbc12b50a8941fe60e8e51b1ffc98d0a635c2cd2fba6`
`font_02_sfnt_off00009dfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9DFA	18756 bytes
SHA-256: `937dc084e295f5db9e9abf98e8d9ece9a75bef1f1a22520950dbcf80e1ec543e`

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