PDF malware analysis — malicious · 7b51d77c307ce18f

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 07:08:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 3d51bf4e82bae5680e042395d209f0d6 SHA-1: bcd829fbf5270b87301765c604891674d361bb30 SHA-256: 7b51d77c307ce18f17a26dba75d659383efccb550906b74dff8abc80e9de396e

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically advertising 'minecraft-115-2-hacks-game-hack'. The document body, though heavily obfuscated, contains references to the same URL. This suggests the PDF is designed as a lure to trick users into downloading potentially malicious software.

Machine Learning

Nyx PDF Classifier malicious score 0.9797

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/479516143/minecraft-115-2-hacks-game-hack PDF link annotation
- https://kupinapopust.mk/pub/img/userfiles/files/free-roblox-glasses_GM431946152.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/robux-earner_GM431946152.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/free-robux-script_GM431946152.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
- https://kupinapopust.mk/pub/img/userfiles/files/hack-the-coin-master-game_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_off000051e1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51E1	25284 bytes
SHA-256: `04dfd4ada264c880be27d087d70c243e67748c0ad15b56a25ce2e38e58bc2e9b`
`font_01_sfnt_off000089dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89DC	18100 bytes
SHA-256: `2d3b27b408d3f739dac69892bb77828e37852eeadeb3aca8b5b98d14a7739d0d`

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