PDF malware analysis — malicious · 1c71465348403440

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 20:51:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 9910d9622dcb7687839c4bbb82d80fb2 SHA-1: 4e8d08d91b7ad7d1801956f37a0c898add120485 SHA-256: 1c7146534840344039d394028b2cdd36ffbb2ec116184b0e08c2f2329547b411

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.tw/app/406889139/coin-master-free-spins-coins-game-hack PDF link annotation
- https://www.sarsen.net/uploads/files/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-com_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/executer-command-roblox-free_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-no-surver_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-rs-500-roblox_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/is-free-robux-real_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/pokemon-go-free-balls-2021_GM1094591345.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-no-inspect-or-waiting_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/wurst-112_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/roblox-high-school-money-hack-2021_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-2021-promo-codes_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_off00002ff9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2FF9	22904 bytes
SHA-256: `0ae141e1914497d3ebc6c0869b4c5b8b403ed189cbd940e364af6c0d097962e0`
`font_01_sfnt_off0000633e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x633E	18176 bytes
SHA-256: `c90cd52c690b3b1dd04b69356ad4f8db221968fb130a3d2ff71dcd50323a1a90`

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