PDF malware analysis — malicious · 6b45424a5e3df4fb

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 12:28:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 9d507f273d3750e714f3bdc4c20e870e SHA-1: b7e77b4763823926b0fd1e5b98d3e12040bf2234 SHA-256: 6b45424a5e3df4fbd71d9d1ea2cf3bc539c49439a8345cdbb343b0502a9f9d36

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains embedded links that redirect to malicious infrastructure, specifically http://netcdn.tw/app/406889139/coin-master-free-spins-link-today-new-2021-game-hack, which is flagged as a malicious redirector. The document's structure and embedded URLs strongly suggest it is designed to lead users to potentially harmful websites, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-today-new-2021-game-hack In PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/free-robux-generator-hack-2021_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/intentan-hackear-mi-cuenta-de-roblox-lyna_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/roblox-top3k-free-model_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/robux-free-fr_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/songify-roblox-cheates_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/btools-hack-roblox-may-2021_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/roblox-pillow-simulator-free-pillows_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-a-weapon-on-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.iseas.com/uploaded_files/userfiles/files/cm-spin-link_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_off000030d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30D7	22644 bytes
SHA-256: `a8a9bc43d7f2dc1005c1b8afbdf3801a1eb1e26e316239238536c510818738d0`
`font_01_sfnt_off0000635f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x635F	19264 bytes
SHA-256: `772d40e0bb928acb9341cb75f2b15664b8c4900532e51e1f27089a6d027a4e0b`

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