PDF malware analysis — malicious · f0e2be9cbc05a235

MALICIOUS

PDF

51.0 KB Created: 2021-06-09 06:24:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 5ab8eb689e304568ee33063fd42e2419 SHA-1: 36bd348fda7ce963114d3bd4ce83cab0fab2e2a7 SHA-256: f0e2be9cbc05a2359efbf52934df3f3d6c537f9f30f2edd3c139937589d7a3e7

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as game hacks and free item generators. The primary lure is the URL https://netcdn.tw/app/431946152/best-script-hacks-roblox-game-hack, which is designed to lead users to potentially harmful content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to malicious infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9713

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.tw/app/431946152/best-script-hacks-roblox-game-hack In PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-ftw_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/cant-press-custromize-button-on-unjailbreak-hack-roblox_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/real-roblox_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/free-pro-tiktok_GM835599320.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/instantrobux_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- http://acquacleanpiscinas.com.br/images/ckfinder/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000517d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x517D	25872 bytes
SHA-256: `53b7960c9af32731135f4b5e45e5fc74a80283d7c8f8d6f9b3fff34e56154d10`
`font_01_sfnt_off00008ca3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CA3	2844 bytes
SHA-256: `baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a`
`font_02_sfnt_off00009660.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9660	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_03_sfnt_off0000a372.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA372	18580 bytes
SHA-256: `bc5a31b1fdb5d782f1f328d2174dd33e098326ce588505f189eba1926bec8377`

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