PDF malware analysis — malicious · 5b8c5409b766b482

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 22:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: a2e7e7ed01adca2f9ad96df879022f5b SHA-1: b3fdbf120894a0dddac7e52e28412574d8116ce5 SHA-256: 5b8c5409b766b48219eebce0255fd84de3b574594b1b3da33b67b8699ce226fc

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document employs a game hack lure to entice users to click on external links. The primary link, https://netcdn.online/app/1330123889/pubg-uc-hack-app-game-hack, and numerous other embedded URLs point to sites offering game-related cheats or generators, which are common pretexts for malware distribution or phishing. No scripts were extracted, but the PDF structure and embedded URIs strongly suggest a malicious intent to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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/1330123889/pubg-uc-hack-app-game-hack PDF link annotation
- http://www.js100.com/uploads/ckeditor/files/minecraft-items_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-balls-2021_GM1094591345.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-hair-roblox_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/tiktok-free-login_GM835599320.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-robux-images_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/try-minecraft-free_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-spins-and-coins-coin-master-app_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
`stream_004_off00004d39.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D39	31504 bytes
SHA-256: `4bb7b5508a3ee5efd937971398cb5397f72144100cc7560ea217fc539ecd25bd`
`font_01_sfnt_off00009400.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9400	18472 bytes
SHA-256: `07bd7a1deba78ff07cffa151e23a9278eb0f82bec692a88c7663d88693bfc6a3`

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