PDF malware analysis — malicious · 69e363b223df9cca

MALICIOUS

PDF

47.3 KB Created: 2021-06-07 09:11:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 16ec9fcdf9e1b8493faa8845ab6ca7c3 SHA-1: 8b5dd24c49040d9a337863a2ccf791e33b3a5967 SHA-256: 69e363b223df9cca4ef33e20416ca53168513ed8262a755006c61c3f376da7f5

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains links to a known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The document body and heuristics indicate a fake CAPTCHA or human verification prompt is displayed to trick users into clicking these malicious links. The primary link identified is https://netcdn.tw/app/431946152/free4now-free-robux-game-hack, which likely serves as a gateway to further malicious content or exploits.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

Heuristics 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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 https://netcdn.tw/app/431946152/free4now-free-robux-game-hack In PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotadumai.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-trading-group_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_off00005673.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5673	28192 bytes
SHA-256: `88b1b7f7d7372ffc12d2a8faecc5876e3ee0d1c290b8300ccdda93b0fda65bb2`
`font_01_sfnt_off00009674.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9674	18240 bytes
SHA-256: `772f97a31426e095a9153954b5248223ebe8656f171107fe1306ae91ea568e7d`

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