PDF malware analysis — malicious · 876b838de8edeb02

MALICIOUS

PDF

50.1 KB Created: 2021-06-03 08:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 1eefaa25813e1fc8add15941ebe21d35 SHA-1: acb801af13fdc1a8574b71018f4064db9dd029d8 SHA-256: 876b838de8edeb029be601c55c330852e2978b72fee25a8edb52fa5aced867f2

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure for "free Robux" and game hacks, directing users to a suspicious URL. The presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document structure and embedded links suggest a social engineering tactic to trick users into visiting a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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-human-verification-game-hack PDF link annotation
- https://www.bathshoponline.co.uk/uploads/files/files/free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/hack-minecraft_GM479516143.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
- https://www.bathshoponline.co.uk/uploads/files/files/how-can-i-get-robux_GM431946152.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_off00005531.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5531	27992 bytes
SHA-256: `6e97deafab760f75f15ccacf3f2a8aaf4fe6763121b0ed3fe46b8e8896b05a19`
`font_01_sfnt_off00009552.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9552	2912 bytes
SHA-256: `888750e3dd3806a51f7983862055752b8701ec80ed8e02dd50d99d977971692c`
`font_02_sfnt_off00009f5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9F5C	18860 bytes
SHA-256: `3ed55990981222bb3dfa17f7dde8eecdc80202874b70715493d2aac032643dcf`

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