PDF malware analysis — malicious · 7f975fd4ae7c89ad

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 19:44:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: aba286d0d456ccf8cf4b9b9118464566 SHA-1: 2d865cfd42e3240764478e44d7fe223871d30fb1 SHA-256: 7f975fd4ae7c89ade85e0510eafdaa887d8ed83c6ddd92a2cb36fe53f7d560af

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 0.9980

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 http://netcdn.tw/app/406889139/coinmaster-free-spins-link-game-hack PDF link annotation
- https://www.sarsen.net/uploads/files/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/is-there-a-free-way-to-earn-robux_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-candy-script-roblox_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/go-through-walls-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-to-get-free-robux-on-roblox-on-an-ipad_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-can-you-get-robux-free_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/hack-robux-roblox_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-roblox-itesms_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/daily-free-spins_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/cone-master_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/but-link-says-free-robux_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_off00003234.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3234	22468 bytes
SHA-256: `f28e4120c7fcad47a9b8456d8fb42fafd968ce901c4c1c91cb65e52734d4d2f7`
`font_01_sfnt_off00006441.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6441	18604 bytes
SHA-256: `a56461d25767162c0803004ff33c87a58be8b3954d443eb111b207e0f06df079`

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