PDF malware analysis — malicious · 3a04f1b3deada721

MALICIOUS

PDF

34.9 KB Created: 2021-07-07 11:24:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 90c5bb4b77030504163ca44438fb8fdf SHA-1: fa66e32933fed1b766ada44132230539f76abcd5 SHA-256: 3a04f1b3deada721b9748d52ddac17c81f51335ffa21240903abb8711458c8dd

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/how-to-get-free-robux-on-phone-game-hack PDF link annotation
- https://www.tiancom.com.tw/upload/files/free-game-points-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/robuxian-com-free-robux-code_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/hban-hacks-in-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-promo-codes-2021-no-hack_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/get-free-roblox-hats-not-patched-working-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-noob-clothes-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/easy-robux-cheat_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-hack-100-real_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-make-a-roblox-hack-using-hxd_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-hack-and-steal-pepoles-robux-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-coin-master-spin-generator_GM406889139.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_off000031ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31EE	22084 bytes
SHA-256: `173aa31cf43e01381fabd5a3142c4e3e76043f38500b0023e85241dfed9d2504`
`font_01_sfnt_off000062bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62BF	19304 bytes
SHA-256: `aa366a8b430bfcb45c9bf263411bccf6e6397de5dc8c3d1b4c1ff1d910733f52`

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