PDF malware analysis — malicious · 4a5ec2fd9e28e1de

MALICIOUS

PDF

41.1 KB Created: 2021-04-27 23:03:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 3d36ca289d9115796e6e6f9946e01672 SHA-1: 633dcf2c1b98e5871628269c7bf793d0844083e6 SHA-256: 4a5ec2fd9e28e1debdac00114bd51231c718dc6a0bc0f365ffa18fecdf2d3309

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and generators for Roblox. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-roblox-accounts-with-tons-of-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/free-roblox-accounts-with-tons-of-robux-game-hack In PDF document text
- https://lib.stie-yai.ac.id/repository/free-robux-generator-no-human-verifascation.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/find-hacked-roblox-account-back.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/free-robux-hack-club.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/roblox-explorer-hack.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/hack-robux-free-2021.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/roblox-hack-week-2021.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/mining-simulator-roblox-hack.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/roblox-dragon-ball-rage-cheats.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/free-robux-sights.pdfIn PDF document text
- https://lib.stie-yai.ac.id/repository/cheat-names-for-roblox.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_003_off0000414c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x414C	26736 bytes
SHA-256: `64baada4219e85c020824735207bcfd82dc7af59cdb08da0a1a8451115beee66`
`font_01_sfnt_off00007dde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DDE	18676 bytes
SHA-256: `2a50c038d59106666e455555a3419c925b19061a9ffac1747c2cfde7a698684b`

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