PDF malware analysis — malicious · c1978f8cc82dc229

MALICIOUS

PDF

34.3 KB Created: 2021-07-20 00:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 2ca0e76719702a1ea346851ae96cde0b SHA-1: d306d4043fe466f30eb9a16980966e30528b78da SHA-256: c1978f8cc82dc229bf32cbab2b576e95aee47279c8b7cea7a5eebfd2e4d631a6

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 0.9955

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/free-robux-websites-that-actually-work-2021-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-free-android_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-roblox-accounts-for-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_off00002c0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C0B	22792 bytes
SHA-256: `9c51b818f2b4fef184261244da45da788563e4bcb18449a00cdcf77df606129e`
`font_01_sfnt_off00005f4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F4C	19840 bytes
SHA-256: `415b7ee37fda4fc7e840ae839cc984cb2b4a0b95548347be2336140620e9a02b`

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