PDF malware analysis — malicious · 9d8850155a3b3a26

MALICIOUS

PDF

35.8 KB Created: 2021-07-07 20:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 6c577f5356856f881195389185abacc5 SHA-1: 14bd5ada6063b0115691ef29a8bab9d8df0fc901 SHA-256: 9d8850155a3b3a2608cb222679107c3f4b7ba818a7ac70e057e14942e8706aaa

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, which is a common social engineering tactic to trick users into clicking malicious links. The embedded URL directs to known malicious redirector infrastructure, likely serving as a gateway to further malicious content or malware. No scripts were extracted from this sample, but the PDF structure and embedded links strongly indicate a phishing or scam attempt.

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/rbxcity-free-robux-game-hack In PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-robux-generator-no-scams-no-verification_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-comment-cheat_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-promotion-codes-roblox_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-get-free-robux-2021-promo-code_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-1billion-robux-hack_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/get-free-robux-by-pay-out-after-offre_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-high-school-life-free-steff_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-clothing-on-roblox-names_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/robux-with-no-email-no-hacks-no-buyings_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/wings-free-roblox_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-roblox-pats-girl_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/coin-master-time-hack-2021_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
`font_00_sfnt_off00003410.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3410	22548 bytes
SHA-256: `4ffb129498e91aceb2290707dbe4480bcd63d54b11914b1a7c6633c6a7721901`
`font_01_sfnt_off00006699.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6699	19120 bytes
SHA-256: `907f950e015ca7f55d34c04d668a41be98fd0850b0b9f22eb15d2dc956c9f495`

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