PDF malware analysis — malicious · 763cbfb94e9bd120

MALICIOUS

PDF

33.7 KB Created: 2021-07-24 00:24:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: d9e95423398b00da03aa9e68fd8094d1 SHA-1: 6a0bdc1ffe31e0ecce04b41e634f49cf4f1a2270 SHA-256: 763cbfb94e9bd12084c6f04e221fac6e0bb60e80de81526ac9b284f516b57652

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/406889139/free-spins-coin-master-app-game-hack. The document body also contains a call-to-action phrase to access this generator. This suggests the primary purpose is to lure users to a potentially malicious site, likely for credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9946

Heuristics 5

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.
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 http://netcdn.tw/app/406889139/free-spins-coin-master-app-game-hack PDF link annotation
- https://lesvossolidarity.org/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
- https://lesvossolidarity.org/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- https://lesvossolidarity.org/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- https://lesvossolidarity.org/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/tiktok-free-views_GM835599320.pdfIn PDF document text
- https://lesvossolidarity.org/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/tiktok-for-free_GM835599320.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
`stream_002_off00002e14.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2E14	23668 bytes
SHA-256: `831d249e6b249710d1ffad0c26da335561282866c90767aaf0eafe380c63c1c3`
`font_01_sfnt_off00006328.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6328	17884 bytes
SHA-256: `ed1ea3c4e7635b9f65a5e0b6798c92341d7c1feababf17669f4466b6be8364ea`

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