PDF malware analysis — malicious · e47ba8cc9d8a4b03

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 14:34:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 82b4859bda48a34c8d0bb083ef3a2091 SHA-1: cb70df776d7638a76abad43a82ef2ef1ae1ceb69 SHA-256: e47ba8cc9d8a4b03da8626402f72c4f93a651f51e73c2f538b202699b383f2fd

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks and generators, such as 'coin-master-hack-without-verification-for-iphone-game-hack'. This strongly suggests a social engineering tactic to lure users to potentially malicious sites, likely for credential harvesting or to deliver further malware. The ML classifier also flagged this PDF as malicious.

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-hack-without-verification-for-iphone-game-hack PDF link annotation
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-mod_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-roblox-characters_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/robux-free-2021_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-bonus_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-coin-master-cheats_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_003_off00004af4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AF4	24760 bytes
SHA-256: `fcb060d7dd3773c7cd01d2772e53c2416978910b8fba241320f205f2c930de82`
`font_01_sfnt_off000083a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83A8	18696 bytes
SHA-256: `b0c3a89d711ec100aafe578ee7b28ea2727b66157cc397f5079d3cb8995e9fec`

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