PDF malware analysis — malicious · 919ec6bd00bb018a

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 20:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 9abf6675bb5d87bb5d181c226905d6d5 SHA-1: 4bff6471508543be7aaa60078203addda01b6255 SHA-256: 919ec6bd00bb018af66528fd66ace2b02dfcc719d4fda180ca4e7a936be11a8f

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a primary lure URL, all pointing towards 'game hacks' and 'free spins' for popular games. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to solicit sensitive information like private keys or passwords under the guise of account recovery. The ML classifier strongly flags this PDF as malicious, suggesting it's part of a phishing or scam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 5

Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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/406889139/moonactive-free-spins-2021-game-hack PDF link annotation
- https://www.tiancom.com.tw/upload/files/coin-master-download_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/earn-robux-websites_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-roblox-glasses_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-win-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-generator_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coinmasterfree_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-piano-hack_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_003_off00004c57.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C57	24540 bytes
SHA-256: `c4f7ca9352e434e9e58288111d33546bbf25fd8def1e52137bcd09822a76613b`
`font_01_sfnt_off000083ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83EC	18400 bytes
SHA-256: `92ca299d7509cbf0a27ca4bb2455c3f9e24f9e6a05476c47560d59a1eb9d663e`

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