PDF malware analysis — malicious · a218f0332ac76701

MALICIOUS

PDF

45.1 KB Created: 2021-05-16 09:01:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: be03b67c1f9c0bd1fff122e577cb1956 SHA-1: 9a45e77315e9c34c3f4b0a98eecd5571d0ca3d6b SHA-256: a218f0332ac76701b4e859711f25a2137649acb2e26b4b17e86edb68b88426d9

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 0.9621

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 https://netcdn.xyz/app/406889139/free-links-coin-master-game-hack PDF link annotation
- https://www.smarthealthme.com/uploaded_files/userfiles/files/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/abd-roblox_GM431946152.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/simplysarc_GM479516143.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
- https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-no-download_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_off00004b0a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B0A	25432 bytes
SHA-256: `628b34ec79097329802e5b937ce2abebbf85f677a2cfe92638369c33d527fd4b`
`font_01_sfnt_off000084df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84DF	2944 bytes
SHA-256: `fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76`
`font_02_sfnt_off00008f09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F09	17880 bytes
SHA-256: `c5130e18caf6f7222c4492e4e2e2fc6b4580e14129763dcab090a363ad6db2dc`

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