PDF malware analysis — malicious · 4a5878cf1d98cb74

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 07:41:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 4323f0a11719cf95af6b76512efbff3e SHA-1: 0ab073bd407a7ea350585a28eb309588d0e6c033 SHA-256: 4a5878cf1d98cb740ec3b866b82955e5c7c5585d206c1f46a802df208a8b7abe

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that are designed to lure users into clicking on them by promising game hacks and free currency. The primary link, 'https://netcdn.xyz/app/406889139/coin-master-spin-free-game-hack', is flagged as a game hack redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploitation or redirection to malicious sites, likely involving JavaScript execution for further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-spin-free-game-hack PDF link annotation
- https://mylittlebigthing.com/assets/images/posts/uploads/files/robux-download_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/minecraft-login-free_GM479516143.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/games-for-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/e-free-roblox_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-robux-generator-com-roblox-hack_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_003_off00004aae.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AAE	24100 bytes
SHA-256: `70aa0c0c1f9398f62843b9ee90271baaf07575fdb0a4b4f5fc911b12c4b1de0b`
`font_01_sfnt_off000081ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81BA	17884 bytes
SHA-256: `f64f8d8cd546afe107dcd88d9ce91258665e3d619825ef5ba403a2abc0c27184`

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