PDF malware analysis — malicious · ebe5b664b9403607

MALICIOUS

PDF

31.6 KB Created: 2021-07-19 17:02:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 1b91e41c14861aa9dcbfd26ebf12c0f6 SHA-1: 7f157319ec7213b95e747db9a1e8a217efe46c2c SHA-256: ebe5b664b9403607e261da671eb7c64895addcffba3b41f0894da75200ad2865

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to free game currency and hacks, directing users to a malicious redirector. The embedded URLs and the document body text, which includes phrases like 'Apps To Get Free Robux' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', strongly indicate a phishing or scam attempt. The presence of multiple links to known malicious infrastructure confirms the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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/apps-to-get-free-robux-game-hack In PDF document text
- http://www.kalaaliaraq.dk/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/robux-com-free_GM431946152.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/roblox-hack_GM431946152.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
- http://www.kalaaliaraq.dk/images/free-ways-to-get-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_off000029b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x29B5	21516 bytes
SHA-256: `5dccefd2be9b716c8e0ba82143cb85e74bcd9a58c6d63b3887b26389840204cf`
`font_01_sfnt_off000058a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x58A4	18480 bytes
SHA-256: `5adc42e6ee0c4a9aa68860894580334acf05e1ff62bdf9cc2e4be84be310e939`

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