PDF malware analysis — malicious · 88c98cb6f2dac7f0

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 21:59:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: a44ca61f77431bb95dbfdf758c6f2172 SHA-1: 63ff088634264e41abce01ebd56d9b924de18697 SHA-256: 88c98cb6f2dac7f01f19a24061c0c80cf9d8b971a60a00c29ffd642167c48199

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a prominent link disguised as a game hack or free spins generator, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the embedded URLs point to potentially malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/free-spins-coin-master-links-game-hack PDF link annotation
- http://www.js100.com/uploads/ckeditor/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/pubg-uc-hack-app_GM1330123889.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-on-ipad_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_004_off0000513e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x513E	24980 bytes
SHA-256: `caea7c0c1643b0bbb69e059a8e4394a56c8754059be7339782d55d779704b11b`
`font_01_sfnt_off00008a17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A17	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00009401.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9401	18056 bytes
SHA-256: `07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a`

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