PDF malware analysis — malicious · d51ab9e8968d1362

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 20:37:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 646a8cf1dadb1e00988bf4c3a5c7dae9 SHA-1: 700aab7820e65df0d8e526c561843c431bd3c9fb SHA-256: d51ab9e8968d13626ae66ff2b4f209b68452c96914e1dd83df7235c5f0164097

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a phishing or redirection attack. No scripts were extracted, but the document's structure and embedded links are indicative of a social engineering attempt to lead the user to a potentially harmful site.

Machine Learning

Nyx PDF Classifier malicious score 0.9984

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.co/app/431946152/free-roblox-place-visits-game-hack PDF link annotation
- https://www.similar.com.tw/upload/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/ww-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-free-robux-maps_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-dat-boi-shirt-roblox_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/robux-online_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/dantdm-shirt-roblox-free_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-unlimited-robux-in-roblox_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/mc-the-miner-free-robux-hack_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-glitches-and-cheats-2021_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/free-roblox-injector-hack_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/roblox-high-school-life-hack_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-hack-to-get-robux-in-roblox_GM431946152.pdfIn PDF document text
- https://www.similar.com.tw/upload/files/how-to-get-free-builders-club-on-roblox-2021_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_off000030bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30BB	22904 bytes
SHA-256: `fa7632696470d0d6781f2c199e8c199c49270958c9a6a79c00e20c0103283219`
`font_01_sfnt_off0000640b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x640B	19164 bytes
SHA-256: `ec29d5a569af665ac779007958edf9c16a35a5085ed8e841f96daa14fc0d31e0`

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