PDF malware analysis — malicious · 547e81bfb8708923

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 06:27:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 72e7090ab6a6d9d6b5bb7193a811e760 SHA-1: f501de8590afee6f97b68d0ab543fd29b8fbae8b SHA-256: 547e81bfb8708923b87a109841b2c53b4bb71a75e75bbbd62185adbaebd0b28b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9864

Heuristics 4

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/431946152/free-robux-without-verification-game-hack PDF link annotation
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/roblox-ame-cheats_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-robux-apk_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/minecraft-login-free_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-robux-that-actually-works_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/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/hack-to-get-free-spins-on-coin-master_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
`stream_004_off00005258.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5258	25828 bytes
SHA-256: `c5649e5d7d5f832464e7d8d9a516ddadebe9ccc8c4fb75eafe987eea5a42a1d7`
`font_01_sfnt_off00008ec6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EC6	18964 bytes
SHA-256: `5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef`

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