PDF malware analysis — malicious · 849ee648e4fb3faf

MALICIOUS

PDF

46.1 KB Created: 2021-05-13 11:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: e4368898c00b94cd5feac657c537d5f1 SHA-1: aa96ecfc885c9865ac40ad974ea5273c5c3846df SHA-256: 849ee648e4fb3fafcad7f4debf1db06f3563a33efc9b7339541dfb2b03f154e0

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 0.9432

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/free-robux-generator-game-hack PDF link annotation
- https://www.simplenepaltravel.com/userfiles/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/roblox-comcom_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/coin-master-website_GM406889139.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
- https://www.simplenepaltravel.com/userfiles/files/free-robux-no-verification-no-survey_GM431946152.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_off00004b5f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B5F	25424 bytes
SHA-256: `786a5c75ae383889efc64296a4d4091f98f4346f9c688a63be3b163bd6798143`
`font_01_sfnt_off000084ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84EF	5596 bytes
SHA-256: `9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5`
`font_02_sfnt_off00009197.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9197	18344 bytes
SHA-256: `10e3e3d4c68cd560ea953d22ca565409121c707f4baa42eec19ee19970d6ace4`

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