PDF malware analysis — malicious · c24a9c58a110e62a

MALICIOUS

PDF

33.2 KB Created: 2021-07-07 04:59:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: f9b290557906f212439822bbaa14ffec SHA-1: f07d1807cf00e5d6fce298c7d3d15389b8b8ae8d SHA-256: c24a9c58a110e62a42bedd157e95223dbdcc3cd90178cf84938e3f57d02182d6

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering free game currency and hacks, such as 'how-to-actually-get-free-robux-game-hack'. These links are flagged as malicious redirectors, indicating a likely phishing or malware distribution attempt. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which is a common social engineering tactic.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

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/431946152/how-to-actually-get-free-robux-game-hack In PDF document text
- https://silvterie.com.br/images/ckfinder/files/pokemon-go-free-friends_GM1094591345.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-get-150-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/case-clicker-hack-roblox-2021_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/robux-win_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-roblox-merch-from-games_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/robux-hack-for-robux-outrageous-bilders-club_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-generator-google-chrome-plugin_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-payment-exe-download-free_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-hacker-greg_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/mcpe-client_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-printable-roblox-cupcake-topper_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/robux-app_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-hack-apk-android-2021_GM431946152.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_off00002b6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2B6F	22124 bytes
SHA-256: `ea12486ec6589768727667c15e9f1290df389849e3979202c77fb85a37921b71`
`font_01_sfnt_off00005c3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C3D	19240 bytes
SHA-256: `caa3459e2df0c933814d087edfbfcbd5173e9d054867d82a012ee6c61ee7aa1c`

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