PDF malware analysis — malicious · a88d445f611d7e78

MALICIOUS

PDF

50.3 KB Created: 2021-05-19 14:07:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 33e84ca1c5373f4c861ea992f64208c3 SHA-1: ab6c7aa27f39bcc37274e83d94e0d64b8dfa1f52 SHA-256: a88d445f611d7e78d38e53e69823107aba694ccd70a29914308ed6dd0c2ce209

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9573

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/431946152/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
- https://www.toyogas.com.tw/upload/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-demon_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/getrobux-now_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/robux-cheat_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/20210-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/client-minecraft_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/spins-coin-master_GM406889139.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_003_off00004acd.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4ACD	31400 bytes
SHA-256: `6153863af3e75602a367d71bdd189517f870bcc15e17d3770c557d660eaf5a95`
`font_01_sfnt_off000094a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94A6	2872 bytes
SHA-256: `5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207`
`font_02_sfnt_off00009e62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E62	19556 bytes
SHA-256: `08b2a18d96b3566ec838f0e87c4bb916e955b8f8af04b9064418114d078945b8`

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