PDF malware analysis — malicious · 718fc3472af6b54e

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 07:49:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 71b73a44986e294ad33949112c099181 SHA-1: 2d7ed122b8324271eb1bc5890fd6d107f352aa60 SHA-256: 718fc3472af6b54e3b556c3bb228dcb9f93fb8b053fbb069dc82a21ccf1bef2f

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into clicking malicious links, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. The document contains numerous links to external PDFs, many of which are related to game hacks and generators, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spin-in-coin-master-game-hack, which likely serves as a redirector to further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 6

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.online/app/406889139/free-spin-in-coin-master-game-hack PDF link annotation
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/tiktok-free-view-iphone-apps_GM835599320.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-link_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_004_off000054dc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x54DC	25136 bytes
SHA-256: `f3a92e0dc5a7cf7a5abb59276ba04bb34eed0fc5affab9fcf08ceefa4583066b`
`font_01_sfnt_off00008e19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E19	17884 bytes
SHA-256: `d73da77b5a1bbc7a2b5b207bcae6a8efd78ccb1f3c8a04009520d94079973ddb`

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