PDF malware analysis — malicious · 4527f96beea23b43

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 21:03:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 5b71728fd982fa9ce3acd58b7b13e6ee SHA-1: e5ef9b97e2e295b4a34ac78595df22560c7d5aea SHA-256: 4527f96beea23b436b59df0a497f6ffd8f64bef3bdf46f97f51916f63dd986d6

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'free Robux' or game hacks, a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs reinforces the attack pattern. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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-robux-ad-game-hack PDF link annotation
- https://hekl-software.de/images/free-robux-cards_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
- https://hekl-software.de/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/coin-master-cheats-free_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/wurst-hacked-client_GM479516143.pdfIn PDF document text
- https://hekl-software.de/images/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/www-bandicam-com-free-robux_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
`stream_003_off0000484c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x484C	27220 bytes
SHA-256: `d3ca3bd06cd2f3ba9fb45d5d2cc20e0acb99c08f4f06b9700b6ac4b3e67f2af8`
`font_01_sfnt_off0000865d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x865D	18188 bytes
SHA-256: `8548f8eac6602b4da1df91b5e613954ee993c39611fc0c0834e4b9af2cb2062a`

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