PDF malware analysis — malicious · 4d27e38199086fa9

MALICIOUS

PDF

32.8 KB Created: 2021-07-20 10:01:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 3ecddbed92a7f47ddb0ac45fbdc32a7d SHA-1: c0d831adae8568401783fe04d382642b30f70698 SHA-256: 4d27e38199086fa9e115bac1c4144210533221fc8d2cdfb2f7a852e97d5e31a4

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded links and a call-to-action phrase, all pointing towards "free Robux" and "game hacks". The primary URL, http://netcdn.tw/app/431946152/roblox-pink-free-robux-game-hack, is directly associated with a game hack lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a potential for exploitation or redirection to malicious sites, likely as part of a phishing or credential harvesting campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

Heuristics 5

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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 http://netcdn.tw/app/431946152/roblox-pink-free-robux-game-hack PDF link annotation
- http://neumann.fr/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
- http://neumann.fr/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
- http://neumann.fr/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- http://neumann.fr/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://neumann.fr/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- http://neumann.fr/images/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
- http://neumann.fr/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- http://neumann.fr/images/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
- http://neumann.fr/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- http://neumann.fr/images/how-to-get-robux-for-free-2021_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_off00002b4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2B4C	22464 bytes
SHA-256: `b618d5a3227162e6c2f31ab8ab8e40b5c9c4b60130b9d034b1c067ffee558496`
`font_01_sfnt_off00005d49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D49	18720 bytes
SHA-256: `53002826280647850bc16f3fbf9b806c5af0b3ffe8d40f39993b9b90d56eee2a`

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