PDF malware analysis — malicious · 548e13d450b354d1

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 16:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 3ff455d6981d8912f1acdfe7d3024312 SHA-1: 2347e4a7ec85caa9da87a5610c6e16bfc98aef37 SHA-256: 548e13d450b354d1b2b285f32fecaf9d06ab4142b39a09f2dc682a2247ff3970

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/431946152/free-robux-card-codes-game-hack PDF link annotation
- https://www.legclub.org/uploads/files/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-robux-without-human-verification-and-survey_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-roebucks-com_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/game-save-gui-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/good-avator-free-20-robux_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/is-minecraft-free_GM479516143.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/how-to-use-roblox-loki-hacks_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/wwwroblox-hack-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/roblox-lumber-tycoon-2-spawn-hack_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/pubg-uc-list_GM1330123889.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/www-robux-redeem_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/get-free-roblox-hair_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_off00003344.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3344	22756 bytes
SHA-256: `8140219848c4564edd12b49a3017f62ae5993a5f2752d21682371660d129f638`
`font_01_sfnt_off00006639.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6639	18888 bytes
SHA-256: `6c6de0ceaed5fc014d3dcce92ca1cb896bf7995edf6e50a0e815779b2f83a656`

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