PDF malware analysis — malicious · 6d23db8027268115

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 05:25:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: d0eb69f28f816f38683ff4c758e8f762 SHA-1: 5841eb2861697700ab8edf8dba5d962001fbc4f5 SHA-256: 6d23db8027268115fe2fd9850a62b0f38f118e1e24b196c2d3532cd76fd61e89

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9971

Heuristics 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/robux-free-2021-game-hack PDF link annotation
- https://dolphintour.vn/images/uploadsfiles/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-hack-pro_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/blox-supply-free-robux_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/krnl-download_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/robux-offer-wall_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-money-hack_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/flame-gg-free-robux_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-hack-generator_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-robux-without-survey_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-com-www_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-robux-com-real_GM431946152.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_off000048c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x48C4	25804 bytes
SHA-256: `8e8983c309d351f97dd99bab195e36bd5b3eac48e0939cf4439587975e73f1df`
`font_01_sfnt_off00008527.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8527	18416 bytes
SHA-256: `1a644f5289783458eb76ac5741ebd0afe9ba6d8f40911ca8ddb4573f3c6c1b2f`

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