PDF malware analysis — malicious · 508a337f5b495a80

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 22:14:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 54d4d0f769facd64af407c8618b6fea1 SHA-1: 78fe67dba8047047a5f9238cae99578a53670668 SHA-256: 508a337f5b495a801532f0b7ee53c784c1e2dee6601d5b947131470ce8af85cd

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9804

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/coinmaster-spins-game-hack PDF link annotation
- 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/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/robux-apk_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-robux-instantly_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-script-hack_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/get-more-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/hackear-coin-master-android_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-card-link-free_GM406889139.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_off00004c4b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C4B	24148 bytes
SHA-256: `f772519df850e5ecaeda4478339b9afb6c5627d343406ef862cb467d1c7c8960`
`font_01_sfnt_off0000837e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x837E	2824 bytes
SHA-256: `381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5`
`font_02_sfnt_off00008d21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D21	17980 bytes
SHA-256: `0e10df361487940e2581119edd14719c4dd850aad5608f5205e635898e5b820d`

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