PDF malware analysis — malicious · cbda3d3e96d54336

MALICIOUS

PDF

33.8 KB Created: 2021-07-08 10:35:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 45d899fb5ba7f38d4bce5bf278fc5fa0 SHA-1: d44287095b1998b285af6a6176d7b969c226a290 SHA-256: cbda3d3e96d54336da68246eecfea5b5de8c2d6b2103ca234363166fc2eacb5d

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/431946152/robux-earner-game-hack PDF link annotation
- https://www.yatrikathmandusuite.com/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/free-roblox-followers_GM431946152.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/roblox-bux-free_GM431946152.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/roblox-printables-free_GM431946152.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.yatrikathmandusuite.com/userfiles/files/coin-master-70-spin-link-today_GM406889139.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
`font_00_sfnt_off00002f85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F85	22112 bytes
SHA-256: `66c620e6e6243456076968303bba9b13ea9ca416c2a474856ec22ae9f6aa13e4`
`font_01_sfnt_off00006061.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6061	18552 bytes
SHA-256: `0606e8ee5c67fe2ec8d9d614024794f335540379fd39c73375d01152fb4400e4`

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