PDF malware analysis — malicious · a4cd5ac7f9535103

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 16:49:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 8849648d33528fe15bc1e96055735185 SHA-1: d961602643265e22f9b28b8ff7b94c05836036b1 SHA-256: a4cd5ac7f9535103c7e928eb7b48633f4eff7b064f698442389a6a53d572100e

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 0.9980

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 http://netcdn.tw/app/479516143/minecraft-hacks-pc-game-hack PDF link annotation
- https://www.toyogas.com.tw/upload/files/roblox-lua-scripting-book-free_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/robux-hack-no-human-verification-pc_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-credit-card-numbers-for-roblox_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/best-roblox-games-with-free-beatbox_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-model-purchase-request-roblox-spam_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/100-free-robux-daily_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/cheat-buddy-roblox-download_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-free-robux-obby-link_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/wurst-mc_GM479516143.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_off00003244.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3244	22336 bytes
SHA-256: `b25cacc344369025d0373bb9e798db0d638460e0147facfaab7ba0ecc0079734`
`font_01_sfnt_off00006396.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6396	18180 bytes
SHA-256: `07b76f9baed0128e51c97dec540ec85ee324852e40b3966ddcd0b7b03af6c7e6`

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