PDF malware analysis — malicious · 7691a40b4d0022e3

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 07:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12

MD5: c956a85508a14b2b7099588d9f67bc8d SHA-1: 7cfb08fc1f9d9179e86c74091e1140aa40a358c3 SHA-256: 7691a40b4d0022e3b9519da77c747203ebdf3da6358e982ab43f722aa6989c6c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary link, http://netcdn.tw/app/431946152/bloxpink-free-robux-game-hack, is identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely as part of a phishing or scam campaign. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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/bloxpink-free-robux-game-hack In PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-hack-roblox-using-command-prompt_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/comment-hacks-roblox-2021-download_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/hack-ing-on-roblox_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/roblox-toys-redeem-codes-free_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/games-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/hack-code-for-roblox-v3rmillion_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/roblox-kohls-admin-house-hack_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-roblox-aim-bot_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-become-a-hacker-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-free-robux-2021-2021-2021_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/how-to-hack-roblox-robux-with-cheat-engine-62_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/roblox-hack-ios-2021_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/free-robux-or-real-without-email-needed_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
- https://www.misceren.com/home/misceren/public_html/upload/files/robux-hack-infinite-robux_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
`font_00_sfnt_off00003266.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3266	22768 bytes
SHA-256: `00fe6f382a51bd230fb8cc256d46fd3524605e91e2420edd2962072c72537c4e`
`font_01_sfnt_off00006563.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6563	19256 bytes
SHA-256: `d97c154dd0756c1bdfd61ea4bb40c4b75f721cb5311919f7d18a850d358a5c9c`

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