PDF malware analysis — malicious · 382fb66bcf2f5542

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 14:28:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 6f69054ab459f3daf9457cd38eb123d9 SHA-1: 72b0376d6abf6e5dbb2c502bdc0773f9923b55af SHA-256: 382fb66bcf2f55428a4e6bae07e4c69248b48a6c500f34fb3bbc16ee5e1200e8

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game-related hacks or generators. The primary link, http://netcdn.tw/app/431946152/how-to-get-free-robux-on-pc-game-hack, is identified as a malicious redirector. The document also contains a visual download button lure and instructions for a password-protected archive, suggesting a multi-stage attack where the actual payload is hidden. The presence of embedded URLs and the nature of the lures indicate a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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/how-to-get-free-robux-on-pc-game-hack In PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/roblox-any-way-to-make-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/roblox-project-jojo-free-vip_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/how-to-cheat-in-horror-tyccon-roblox_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/coins-master_GM406889139.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/roblox-hacks-2021-download_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/pokemon-go-free-joystick-ios_GM1094591345.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/hack-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-into-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/free-roblox-redeem-codes-11-2-16_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/free-robux-no-password-obby_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/minecraft-free-install_GM479516143.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/roblox-face-err-free_GM431946152.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.ferraroni.net/public/risorse/ck/files/free-script-executor-roblox_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_off00002e87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E87	22904 bytes
SHA-256: `e9bc7a8ce82fca625c320964549418002f7ab5940953fe327870d9dcceee802e`
`font_01_sfnt_off00006211.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6211	19136 bytes
SHA-256: `aef8c40112b84489b97b1b1a2bbf6c88e9b8fe4bc85a356f803a45374dab5087`

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