PDF malware analysis — malicious · 3687e762db937539

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 23:17:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: a0da88bb175f0d576d98909671409722 SHA-1: acf76f3da71c2e935dfbf3e4ad5f66f0b1c686b9 SHA-256: 3687e762db937539bd709304144d57bc0fffebebdf8bdb041117481ef96dc8e4

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded text promoting a "free Robux generator" or "game hack". These links redirect to malicious infrastructure, specifically the URL http://netcdn.tw/app/431946152/how-to-get-free-robux-with-no-verification-game-hack, which is flagged as a malicious redirector. The document's primary purpose appears to be social engineering users into visiting this malicious site, likely to deliver further malware or conduct phishing.

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/how-to-get-free-robux-with-no-verification-game-hack In PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-do-you-get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-coins_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
- https://www.pearlsayurvedclinics.com/cote_dor_import/admin/ckfinder/userfiles/files/blackberry-roblox-jailbreak-hack_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_off000030a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30A6	22120 bytes
SHA-256: `0d285bb5a742ed1c412f0ada268be4a9f9e49b7bf4a35186c253e97914bc3987`
`font_01_sfnt_off000061af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61AF	19604 bytes
SHA-256: `1416ca7cd14a43413051d0f78c9165075e98db2c1fb870b3eb17660d32a91470`

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