PDF malware analysis — malicious · 706601509b9290bb

MALICIOUS

PDF

45.8 KB Created: 2021-05-13 23:26:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: fd63abc453c994aa8965b3778a0ca9d3 SHA-1: 09b92a528502d5d7823d305922f7ad43d98e6a6b SHA-256: 706601509b9290bb16755773dc1c50e1c34d1e87727515f1ed279127663785be

62 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent external URI pointing to sites offering free in-game currency, indicative of a phishing or scam lure. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous links and the document's theme suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

Heuristics 4

Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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 https://netcdn.xyz/app/406889139/coin-master-free-spins-link-2021-blogger-game-hack
- http://instrutech.co.th/images/oprewards-com-login_GM431946152.pdf
- http://instrutech.co.th/images/free-robux-2021_GM431946152.pdf
- http://instrutech.co.th/images/roblox-army-free-robux_GM431946152.pdf
- http://instrutech.co.th/images/free-robux-with-no-survey_GM431946152.pdf
- http://instrutech.co.th/images/earn-robux-for-roblox_GM431946152.pdf
- http://instrutech.co.th/images/roblox-studio-free-robux_GM431946152.pdf
- http://instrutech.co.th/images/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdf
- http://instrutech.co.th/images/coin-master_GM406889139.pdf
- http://instrutech.co.th/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
- http://instrutech.co.th/images/coin-master-rewards-app_GM406889139.pdf
- http://instrutech.co.th/images/free-robux-place_GM431946152.pdf
- http://instrutech.co.th/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
- http://instrutech.co.th/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
- http://instrutech.co.th/images/coin-master-hack-mobile_GM406889139.pdf
- http://instrutech.co.th/images/robux-survey_GM431946152.pdf
- http://instrutech.co.th/images/earn-free-spins-coin-master_GM406889139.pdf
- http://instrutech.co.th/images/how-to-get-free-robux-on-roblox_GM431946152.pdf
- http://instrutech.co.th/images/how-to-get-free-robux-easy_GM431946152.pdf
- http://instrutech.co.th/images/robux-games_GM431946152.pdf
- http://instrutech.co.th/images/free-robux-wheel_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004936.bin` `76d692eec880d47c54c96470fd4ef5b59df62b4919f6193847767a3abd55de64`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4936	25320 bytes
`font_01_sfnt_off0000831d.bin` `8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x831D	3204 bytes
`font_02_sfnt_off00008e21.bin` `6906a9989d8784d6f8a9776352e09c335330dbd77f725755b0e4967acb3193dc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E21	19036 bytes

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