PDF malware analysis — malicious · b83345b48ad6425a

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 08:11:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: a261739dcc931712cd3caf9029e1e6de SHA-1: c70c61d5db39e4e3c75a6d79c93e0d6849ab908a SHA-256: b83345b48ad6425a0ab845f50f0ba8b68629ca3df2a7dfd09a2386d5c7063354

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector. The document body and embedded links suggest a lure for game-related cheats or free accounts, likely intended to lead users to download further malicious content or compromise their accounts. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

Heuristics 4

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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.online/app/406889139/free-spin-coin-master-2021-link-game-hack In PDF document text
- https://www.tiancom.com.tw/upload/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-coin-master-s_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-roblox-executor_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/114-hacks_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000510e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x510E	25448 bytes
SHA-256: `b62d59debe9c51e7e7584e4f2f341cc6436f1b5c448f614373acc741dc417a67`
`font_01_sfnt_off00008b54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B54	3204 bytes
SHA-256: `8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa`
`font_02_sfnt_off00009658.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9658	18456 bytes
SHA-256: `7500aca679d0fadfbda1e17cf023a195ee80a601fef81e7f7ced8cf50182af56`

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