PDF malware analysis — malicious · 21645e2fde767883

MALICIOUS

PDF

36.2 KB Created: 2021-07-07 09:50:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: f08b740b28b8032a567edb63163c2659 SHA-1: ffaff0dfc1c8549a692744512fea773211f9bb61 SHA-256: 21645e2fde767883ebb725bdf78f9806ba44cb9fd75a75c211ead43f6835e592

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and other PDF files, all promoting 'game hacks' and 'free spins' for games like Coin Master and Roblox. The primary redirector URL, http://netcdn.tw/app/406889139/coin-master-hack-spin-160-pro-game-hack, is flagged as malicious. The document's content and structure strongly suggest a phishing or scam attempt, likely to lead users to further malicious content or potentially malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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 http://netcdn.tw/app/406889139/coin-master-hack-spin-160-pro-game-hack In PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/easiest-money-hack-febuary-roblox-rocitizens_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-roblox-wallpapers_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/games-that-really-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/rbx-website_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/donald-trump-free-robux_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/how-to-hack-a-group-on-roblox-to-own-2021_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/roblox-bandit-simulator-codes-new-hacker-update_GM431946152.pdfIn PDF document text
- https://www.indahkonveksi.com/ckfinder/userfiles/files/gold-card-coin-master-free_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
`font_00_sfnt_off0000365c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x365C	22760 bytes
SHA-256: `bd882089efc0cf2a2b32787f4ca94a272f5f76969e0b0043ff34662efcec7d85`
`font_01_sfnt_off00006941.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6941	18780 bytes
SHA-256: `af4936e3ccb6416df15e8de664b166a9aa200208572627e4f7bda013e34b6fdb`

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