PDF malware analysis — malicious · 6bb081675729eb30

MALICIOUS

PDF

49.6 KB Created: 2021-06-03 12:05:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 4394fc3ea02053802c2c1130e2de8664 SHA-1: efe3bcd3da60c088ad8045d60b754b18857ec344 SHA-256: 6bb081675729eb30a474f81aa6078851cb3f92b417c7bf2f1f63a9d03501bb33

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 0.9796

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.online/app/431946152/roblox-hack-me-robux-game-hack PDF link annotation
- https://www.insol-europe.org/uploads/files/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/roblox-hack-download-2021-pc_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/pokemon-go-hack-free-download-ios_GM1094591345.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/robux-online_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/robux-earner_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-hacks-reddit_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_004_off00005449.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5449	27772 bytes
SHA-256: `6da4c86f4bacb0d6b4d383aab0caddc4e033511f60c2753522d45153988939e1`
`font_01_sfnt_off000094d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94D6	2880 bytes
SHA-256: `106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081`
`font_02_sfnt_off00009ec7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EC7	18520 bytes
SHA-256: `a375bd11c65aaa265b5abc99eda8135c05062389b04afd63241033984f92b3c1`

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