PDF malware analysis — malicious · 4ac456360c6f414c

MALICIOUS

PDF

32.1 KB Created: 2021-07-30 02:19:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 25bc601bc400a406e0fa693be96a21fd SHA-1: 7a291f525a8daabb3b755b43df4db31505c3ab84 SHA-256: 4ac456360c6f414c400330d637e30033a5370d873aef2c6d9c35fd320b78b4fa

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising "free generators" and "game hacks" to lure victims. The primary malicious URL identified is http://netcdn.tw/app/431946152/how-to-get-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector pattern, likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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-get-free-robux-game-hack In PDF document text
- https://lesvossolidarity.org/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- https://lesvossolidarity.org/images/minecraft-free-install_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://lesvossolidarity.org/images/minecraft-java-free_GM479516143.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
- https://lesvossolidarity.org/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- https://lesvossolidarity.org/images/is-minecraft-free-on-ps4_GM479516143.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_off000028b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x28B2	22356 bytes
SHA-256: `3a29855c6f5c40467a157f226954e656399a47626ff0d89eb6048627a20b01c9`
`font_01_sfnt_off00005a86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A86	18468 bytes
SHA-256: `bfd0bb3e535f31ad3dec3a4faa455a2d823d510b4f27f0e8fabe0982a1b88800`

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