PDF malware analysis — malicious · 2c657ed3f027417c

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 07:03:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 587118927d0a91adde316e3039dcd136 SHA-1: 8479bf48eee2295a8c9725b923361d720f19ddbd SHA-256: 2c657ed3f027417c8c649c2d6f6481bcb2b9450e14ddcfeb467d1183ce8a333d

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

Heuristics 5

Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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.
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 https://netcdn.online/app/406889139/free-coins-on-coin-master-game-hack PDF link annotation
- https://www.journalofpracticenursing.co.uk/uploads/files/files/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/get-robux-today_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-robux-games_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/rewards-roblox_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/buy-robux-free_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/coin-master-free-box_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005490.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5490	25844 bytes
SHA-256: `ab66d8a562850007e6d5239f84631009ebcb3d96a187a1c8e46ad03d15df7f5a`
`font_01_sfnt_off0000907a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x907A	4804 bytes
SHA-256: `7623c3c2a4742258390e3d6271ac6b1e3fda47400c0ba0fd16778aa069a8d895`
`font_02_sfnt_off0000a043.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA043	17712 bytes
SHA-256: `6ea46f87f2167b805a87cbef3ad9b5ecf4d2513d7b8c5fe933be1d22f28e2546`

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