PDF malware analysis — malicious · c8f779d0022c4e9d

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 12:26:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 18b14aa4b3629bfd6fd443d2ce044eb7 SHA-1: aadc65991433269b11e1ac3d2717e9f2fc5d3594 SHA-256: c8f779d0022c4e9d56e3c1a064a7f6c92c2a23ea097f19ba7a24626e2bdd9f34

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a lure for a game hack, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to a potentially malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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/406889139/daily-free-spin-coin-master-link-game-hack PDF link annotation
- https://www.insol-europe.org/uploads/files/files/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-links-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/earn-robux-com_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/collect-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/freespinandcoin_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-robux-2021_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
`stream_004_off00005185.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5185	23744 bytes
SHA-256: `82f2a012f017f2f8f0bd38a85e3b2b6e518cfc01fcf872929460784e5ed8fb30`
`font_01_sfnt_off000087b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87B1	18476 bytes
SHA-256: `13087f23ced5a654764a402ace47e06b7ceeb886891228a443e0cb07dd9c4176`

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