PDF malware analysis — malicious · 5900422a65988874

MALICIOUS

PDF

34.4 KB Created: 2021-07-19 19:34:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 0bf6712b8345dad3be41ef08fa693bcd SHA-1: d0fe04dcdc880473a0fae770ef1fbbf4304b032e SHA-256: 5900422a65988874dda0fc992d975f19364db45e470d72265374097e5de72bda

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are presented as "free generator / game hack" lures, specifically targeting popular games like Robux and Minecraft. The primary URL, http://netcdn.tw/app/431946152/how-to-get-robux-for-free-2021-game-hack, is a strong indicator of a social engineering attack aimed at tricking users into visiting potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a common pattern for distributing malware or conducting phishing through deceptive content.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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/how-to-get-robux-for-free-2021-game-hack PDF link annotation
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-free-download_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-free_GM479516143.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_off0000300b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x300B	22800 bytes
SHA-256: `0ab06cf543c5ad7e93aa4c8c12c0c55d8fda98187a604d54625fa3c558c0c237`
`font_01_sfnt_off00006295.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6295	18868 bytes
SHA-256: `5a8c8e86d5d4dd1cc9266912e870fa4b5beecfa6d543cb137e4a029f0406ff4b`

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