PDF malware analysis — malicious · 749d858bbdc405e1

MALICIOUS

PDF

47.0 KB Created: 2021-05-15 07:31:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 8d999ca3316581542758890a61196fb1 SHA-1: a73e8d8f6beffc8f63752ed68da0209ed7fe2b17 SHA-256: 749d858bbdc405e1d6f4260c5ebd275b0e27d1c3e44390cdc477802efa442744

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 0.8948

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/robux-free-com-game-hack PDF link annotation
- https://www.astrospace.com.tw/upload/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-robux-real-working_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/original-roblox_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-app-hacks_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/wurst-18-9_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/roblox-font-free_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/get-free-robux_GM431946152.pdfIn 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_off00004b2c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B2C	27088 bytes
SHA-256: `ca5748c8f6c3dc06b05f0e263ceed81a1f6ce7c673016de1a29c312b49e58377`
`font_01_sfnt_off000088d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88D4	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off0000957c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x957C	18276 bytes
SHA-256: `0fd65c317a1abc649e3faff400e4768e1aa7d1dd6ac5589c15474ffa47aab2c1`

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